NVD / CVE Program· CNA apache
CVE-2020-13956: Apache HttpClient versions prior to version 4.5.13 and 5.0.3 can misinterpret malformed authority component in request URIs passed to the…
MediumCVSS 5.3 · v3.1—No exploit Fix available
Noroxi assessment
Priority: Monitor (action score 24/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 9% (FIRST EPSS); higher than 95.3% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
- According to CISA the attack is automatable: targets can be found by mass scanning.
- Fixed version: aopalliance (AlmaLinux:8) 1.0-20.module_el8.6.0+2786+d7c38b21, 1.0-17.module_el8.6.0+2752+f1f3449e; apache-commons-cli (AlmaLinux:8) 1.4-4.module_el8.6.0+2752+f1f3449e, 1.4-7.module_el8.6.0+2786+d7c38b21; apache-commons-codec (AlmaLinux:8) 1.11-3.module_el8.6.0+2752+f1f3449e, 1.13-3.module_el8.6.0+2786+d7c38b21.
- Mentioned 6 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to aopalliance (AlmaLinux:8) 1.0-20.module_el8.6.0+2786+d7c38b21, 1.0-17.module_el8.6.0+2752+f1f3449e; apache-commons-cli (AlmaLinux:8) 1.4-4.module_el8.6.0+2752+f1f3449e, 1.4-7.module_el8.6.0+2786+d7c38b21; apache-commons-codec (AlmaLinux:8) 1.11-3.module_el8.6.0+2752+f1f3449e, 1.13-3.module_el8.6.0+2786+d7c38b21 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
Apache HttpClient versions prior to version 4.5.13 and 5.0.3 can misinterpret malformed authority component in request URIs passed to the library as java.net.URI object and pick the wrong target host for request execution.
- Published
- Dec 2, 2020
- Updated
- Oct 8, 2026
- EPSS
- 9.0% · 95th percentile
- CWE
- CWE-20
Report tools
Action score
24
Monitor
Low priority for now.
- CVSS
- 21 / 40 · 5.3 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 3 / 30 · 9.0%
CISA SSVC decision
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 5.3
- CNA · apache
- 5.3
- agree
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
Is your version affected? Check itNoroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| apache | httpclient | cpe:2.3:a:apache:httpclient |
| quarkus | quarkus | cpe:2.3:a:quarkus:quarkus |
| oracle | data integrator | cpe:2.3:a:oracle:data_integrator |
| oracle | jd edwards enterpriseone orchestrator | cpe:2.3:a:oracle:jd_edwards_enterpriseone_orchestrator |
| oracle | jd edwards enterpriseone tools | cpe:2.3:a:oracle:jd_edwards_enterpriseone_tools |
| oracle | nosql database | cpe:2.3:a:oracle:nosql_database |
| oracle | peoplesoft enterprise peopletools | cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools |
| oracle | peoplesoft enterprise pt peopletools | cpe:2.3:a:oracle:peoplesoft_enterprise_pt_peopletools |
| oracle | primavera unifier | cpe:2.3:a:oracle:primavera_unifier |
| oracle | retail customer management and segmentation foundation | cpe:2.3:a:oracle:retail_customer_management_and_segmentation_foundation |
| oracle | spatial studio | cpe:2.3:a:oracle:spatial_studio |
| oracle | sql developer | cpe:2.3:a:oracle:sql_developer |
and 5 more
Versions reported by the vendor
Affected version ranges reported by the assigning authority (apache). Independent of NVD's CPE analysis and usually ahead of it.
n/a Apache HttpClient
- 4.5.12 and prior, 5.0.2 and prioraffected
Affected versions · NVD (20)
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- apache httpclientbefore 4.5.13
- apache httpclient5.0.0 and later · before 5.0.3
- netapp active iq unified managerall versions
- netapp snapcenterall versions
- oracle commerce guided search11.3.2
- oracle communications cloud native core service communication proxy1.14.0
- oracle data integrator12.2.1.3.0
- oracle data integrator12.2.1.4.0
- oracle jd edwards enterpriseone orchestratorbefore 9.2.6.0
- oracle jd edwards enterpriseone toolsbefore 9.2.6.0
- oracle nosql databasebefore 20.3
- oracle peoplesoft enterprise peopletools8.57
- oracle peoplesoft enterprise peopletools8.58
- oracle peoplesoft enterprise pt peopletools8.57
- oracle peoplesoft enterprise pt peopletools8.58
- oracle peoplesoft enterprise pt peopletools8.59
- oracle primavera unifier17.7 and later · up to 17.12 inclusive
- oracle primavera unifier16.1
- oracle primavera unifier16.2
- oracle primavera unifier18.8
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | aopalliance | before 1.0-20.module_el8.6.0+2786+d7c38b21 | 1.0-20.module_el8.6.0+2786+d7c38b21 |
| AlmaLinux:8 | aopalliance | before 1.0-17.module_el8.6.0+2752+f1f3449e | 1.0-17.module_el8.6.0+2752+f1f3449e |
| AlmaLinux:8 | apache-commons-cli | before 1.4-4.module_el8.6.0+2752+f1f3449e | 1.4-4.module_el8.6.0+2752+f1f3449e |
| AlmaLinux:8 | apache-commons-cli | before 1.4-7.module_el8.6.0+2786+d7c38b21 | 1.4-7.module_el8.6.0+2786+d7c38b21 |
| AlmaLinux:8 | apache-commons-codec | before 1.11-3.module_el8.6.0+2752+f1f3449e | 1.11-3.module_el8.6.0+2752+f1f3449e |
| AlmaLinux:8 | apache-commons-codec | before 1.13-3.module_el8.6.0+2786+d7c38b21 | 1.13-3.module_el8.6.0+2786+d7c38b21 |
| AlmaLinux:8 | apache-commons-io | before 1:2.6-3.module_el8.6.0+2752+f1f3449e | 1:2.6-3.module_el8.6.0+2752+f1f3449e |
| AlmaLinux:8 | apache-commons-io | before 1:2.6-6.module_el8.6.0+2786+d7c38b21 | 1:2.6-6.module_el8.6.0+2786+d7c38b21 |
| AlmaLinux:8 | apache-commons-lang3 | before 3.7-3.module_el8.6.0+2752+f1f3449e | 3.7-3.module_el8.6.0+2752+f1f3449e |
| AlmaLinux:8 | apache-commons-lang3 | before 3.9-4.module_el8.6.0+2786+d7c38b21 | 3.9-4.module_el8.6.0+2786+d7c38b21 |
| AlmaLinux:8 | apache-commons-logging | before 1.2-13.module_el8.6.0+2752+f1f3449e | 1.2-13.module_el8.6.0+2752+f1f3449e |
| AlmaLinux:8 | atinject | before 1-31.20100611svn86.module_el8.6.0+2786+d7c38b21 | 1-31.20100611svn86.module_el8.6.0+2786+d7c38b21 |
| AlmaLinux:8 | atinject | before 1-28.20100611svn86.module_el8.6.0+2752+f1f3449e | 1-28.20100611svn86.module_el8.6.0+2752+f1f3449e |
| AlmaLinux:8 | cdi-api | before 2.0.1-3.module_el8.6.0+2786+d7c38b21 | 2.0.1-3.module_el8.6.0+2786+d7c38b21 |
| AlmaLinux:8 | cdi-api | before 1.2-8.module_el8.6.0+2752+f1f3449e | 1.2-8.module_el8.6.0+2752+f1f3449e |
| AlmaLinux:8 | geronimo-annotation | before 1.0-26.module_el8.6.0+2786+d7c38b21 | 1.0-26.module_el8.6.0+2786+d7c38b21 |
| AlmaLinux:8 | geronimo-annotation | before 1.0-23.module_el8.6.0+2752+f1f3449e | 1.0-23.module_el8.6.0+2752+f1f3449e |
| AlmaLinux:8 | glassfish-el-api | before 3.0.1-0.7.b08.module_el8.6.0+2752+f1f3449e | 3.0.1-0.7.b08.module_el8.6.0+2752+f1f3449e |
| AlmaLinux:8 | google-guice | before 4.2.2-4.module_el8.6.0+2786+d7c38b21 | 4.2.2-4.module_el8.6.0+2786+d7c38b21 |
| AlmaLinux:8 | google-guice | before 4.1-11.module_el8.6.0+2752+f1f3449e | 4.1-11.module_el8.6.0+2752+f1f3449e |
| AlmaLinux:8 | guava | before 28.1-3.module_el8.6.0+2786+d7c38b21 | 28.1-3.module_el8.6.0+2786+d7c38b21 |
| AlmaLinux:8 | guava20 | before 20.0-8.module_el8.6.0+2752+f1f3449e | 20.0-8.module_el8.6.0+2752+f1f3449e |
| AlmaLinux:8 | hawtjni-runtime | before 1.16-2.module_el8.6.0+2752+f1f3449e | 1.16-2.module_el8.6.0+2752+f1f3449e |
| AlmaLinux:8 | httpcomponents-client | before 4.5.5-5.module_el8.6.0+2752+f1f3449e | 4.5.5-5.module_el8.6.0+2752+f1f3449e |
+96
Same product
apache: all recordsOther highest-scoring records for the same primary product.
- CVE-2013-4366http/impl/client/HttpClientBuilder.java in Apache HttpClient 4.3.x before 4.3.1 does not ensure that X509HostnameVerifier is not null…40Plan
- CVE-2026-71290Apache HttpComponents Client: TLS hostname verification silently disabled on the async transport (default config, MITM)36Monitor
- CVE-2025-27820Apache HttpComponents: PSL (Public Suffix List) validation bypass30Monitor
Published before and after this one in the same product
- ← EarlierCVE-2014-3577Aug 21, 2014 · org.apache.http.conn.ssl.AbstractVerifier in Apache HttpComponents HttpClient before 4.3.5 and HttpAsyncClient before 4.0.2 does not…26Monitor
- ← EarlierCVE-2015-5262Oct 27, 2015 · http/conn/ssl/SSLConnectionSocketFactory.java in Apache HttpComponents HttpClient before 4.3.6 ignores the http.socket.timeout…23Monitor
- Later →CVE-2026-40542Apr 22, 2026 · Apache HttpClient: SCRAM-SHA-256 mutual authentication bypass may cause the client to accept authentication without proper mutual authentication verification29Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| almalinux:aopalliance | 1.0-20.module_el8.6.0+2786+d7c38b21 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:apache-commons-cli | 1.4-7.module_el8.6.0+2786+d7c38b21 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:apache-commons-codec | 1.13-3.module_el8.6.0+2786+d7c38b21 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:apache-commons-io | 1:2.6-6.module_el8.6.0+2786+d7c38b21 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:apache-commons-lang3 | 3.9-4.module_el8.6.0+2786+d7c38b21 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:atinject | 1-31.20100611svn86.module_el8.6.0+2786+d7c38b21 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:cdi-api | 2.0.1-3.module_el8.6.0+2786+d7c38b21 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:geronimo-annotation | 1.0-26.module_el8.6.0+2786+d7c38b21 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:google-guice | 4.2.2-4.module_el8.6.0+2786+d7c38b21 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:guava | 28.1-3.module_el8.6.0+2786+d7c38b21 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:httpcomponents-client | 4.5.10-4.module_el8.6.0+2786+d7c38b21 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:httpcomponents-core | 4.4.12-3.module_el8.6.0+2786+d7c38b21 · AlmaLinux:8 | Package registry (OSV) |
| debian:httpcomponents-client | 4.5.13-1 · Debian:12 | Package registry (OSV) |
| Maven:org.apache.httpcomponents:httpclient | 4.5.13 | Package registry (OSV) |
| Maven:org.apache.httpcomponents:httpclient | 5.0.3 | Package registry (OSV) |
| opensuse:clojure | 1.10.3.855-1.2 · openSUSE:Tumbleweed | Package registry (OSV) |
| opensuse:httpcomponents-client | 4.5.14-150200.3.9.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| opensuse:httpcomponents-core | 4.4.14-150200.3.9.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| red hat:eap7-activemq-artemis | 0:2.9.0-7.redhat_00017.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6 | Package registry (OSV) |
| red hat:eap7-activemq-artemis-cli | 0:2.9.0-7.redhat_00017.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6 | Package registry (OSV) |
| red hat:eap7-activemq-artemis-commons | 0:2.9.0-7.redhat_00017.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6 | Package registry (OSV) |
| red hat:eap7-activemq-artemis-core-client | 0:2.9.0-7.redhat_00017.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6 | Package registry (OSV) |
| red hat:eap7-activemq-artemis-dto | 0:2.9.0-7.redhat_00017.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6 | Package registry (OSV) |
| red hat:eap7-activemq-artemis-hornetq-protocol | 0:2.9.0-7.redhat_00017.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6 | Package registry (OSV) |
| red hat:eap7-activemq-artemis-hqclient-protocol | 0:2.9.0-7.redhat_00017.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6 | Package registry (OSV) |
| red hat:eap7-activemq-artemis-jdbc-store | 0:2.9.0-7.redhat_00017.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6 | Package registry (OSV) |
| red hat:eap7-activemq-artemis-jms-client | 0:2.9.0-7.redhat_00017.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6 | Package registry (OSV) |
| red hat:eap7-activemq-artemis-jms-server | 0:2.9.0-7.redhat_00017.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6 | Package registry (OSV) |
| red hat:eap7-activemq-artemis-journal | 0:2.9.0-7.redhat_00017.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6 | Package registry (OSV) |
| red hat:eap7-activemq-artemis-ra | 0:2.9.0-7.redhat_00017.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6 | Package registry (OSV) |
+14
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-21-0989 · Dec 13, 2021(IBM Güvenlik Bildirimi)
- TR-21-0435 · Jun 2, 2021(IBM Güvenlik Bülteni Yayınladı)
- TR-21-0331 · Apr 21, 2021(Oracle Güvenlik Uyarısı Yayınladı)
- TR-21-0166 · Feb 23, 2021(IBM Güvenlik Bülteni Yayınladı)
- TR-21-0157 · Feb 22, 2021(IBM Güvenlik Bülteni Yayınladı)
- TR-20-955 · Nov 13, 2020(IBM Ürünleri Zafiyeti)
Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- low · data or configuration can be modified
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- Low
- Availability impact
- None
Weakness class (CWE)
CWE-20 · Improper Input ValidationCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Server Side Include (SSI) InjectionCAPEC-101likelihood: High · High
- Cross Zone ScriptingCAPEC-104likelihood: Medium · High
- Command Line Execution through SQL InjectionCAPEC-108likelihood: Low · Very High
- Object Relational Mapping InjectionCAPEC-109likelihood: Low · High
- SQL Injection through SOAP Parameter TamperingCAPEC-110likelihood: High · Very High
- Double EncodingCAPEC-120likelihood: Low · Medium
- Subverting Environment Variable ValuesCAPEC-13likelihood: High · Very High
ATT&CK techniques
- Obfuscated Files or InformationT1027
- Masquerading: Invalid Code SignatureT1036.001
- Steal Web Session CookieT1539
- Subvert Trust Controls: Code SigningT1553.002
- Impair Defenses:Impair Command History LoggingT1562.003
- Hijack Execution Flow:Dynamic Linker HijackingT1574.006
- Hijack Execution Flow:Path Interception by PATH Environment VariableT1574.007
Change log (2)
- SSVC exploitation— → none
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (19 more)Show less
- lists.apache.org/thread.html/r043a75acdeb52b15dd5e9524cdadef4202e6a5228644206acf9363f9%40%3Cdev.hive.apache.org%3E
- lists.apache.org/thread.html/r06cf3ca5c8ceb94b39cd24a73d4e96153b485a7dac88444dd876accb%40%3Cissues.drill.apache.org%3E
- lists.apache.org/thread.html/r0a75b8f0f72f3e18442dc56d33f3827b905f2fe5b7ba48997436f5d1%40%3Cissues.solr.apache.org%3E
- lists.apache.org/thread.html/r0bebe6f9808ac7bdf572873b4fa96a29c6398c90dab29f131f3ebffe%40%3Cissues.solr.apache.org%3E
- lists.apache.org/thread.html/r12cb62751b35bdcda0ae2a08b67877d665a1f4d41eee0fa7367169e0%40%3Cdev.ranger.apache.org%3E
- lists.apache.org/thread.html/r132e4c6a560cfc519caa1aaee63bdd4036327610eadbd89f76dd5457%40%3Cdev.creadur.apache.org%3E
- lists.apache.org/thread.html/r2835543ef0f91adcc47da72389b816e36936f584c7be584d2314fac3%40%3Cissues.lucene.apache.org%3E
- lists.apache.org/thread.html/r2a03dc210231d7e852ef73015f71792ac0fcaca6cccc024c522ef17d%40%3Ccommits.creadur.apache.org%3E
- lists.apache.org/thread.html/r2dc7930b43eadc78220d269b79e13ecd387e4bee52db67b2f47d4303%40%3Cgitbox.hive.apache.org%3E
- lists.apache.org/thread.html/r34178ab6ef106bc940665fd3f4ba5026fac3603b3fa2aefafa0b619d%40%3Cdev.ranger.apache.org%3E
- lists.apache.org/thread.html/r34efec51cb817397ccf9f86e25a75676d435ba5f83ee7b2eabdad707%40%3Ccommits.creadur.apache.org%3E
- lists.apache.org/thread.html/r3cecd59fba74404cbf4eb430135e1080897fb376f111406a78bed13a%40%3Cissues.lucene.apache.org%3E
- lists.apache.org/thread.html/r3f740e4c38bba1face49078aa5cbeeb558c27be601cc9712ad2dcd1e%40%3Ccommits.creadur.apache.org%3E
- lists.apache.org/thread.html/r4850b3fbaea02fde2886e461005e4af8d37c80a48b3ce2a6edca0e30%40%3Cissues.solr.apache.org%3E
- lists.apache.org/thread.html/r549ac8c159bf0c568c19670bedeb8d7c0074beded951d34b1c1d0d05%40%3Cdev.drill.apache.org%3E
- lists.apache.org/thread.html/r55b2a1d1e9b1ec9db792b93da8f0f99a4fd5a5310b02673359d9b4d1%40%3Cdev.drill.apache.org%3E
- lists.apache.org/thread.html/r5b55f65c123a7481104d663a915ec45a0d103e6aaa03f42ed1c07a89%40%3Cdev.jackrabbit.apache.org%3E
- lists.apache.org/thread.html/r5de3d3808e7b5028df966e45115e006456c4e8931dc1e29036f17927%40%3Cissues.solr.apache.org%3E
- lists.apache.org/thread.html/r5fec9c1d67f928179adf484b01e7becd7c0a6fdfe3a08f92ea743b90%40%3Cissues.hive.apache.org%3E
Vendor advisories and official records. Exploit/PoC links are deliberately left out.