In Apache HTTP server 2.4.0 to 2.4.39, Redirects configured with mod_rewrite that were intended to be self-referential might be fooled by en
Noroxi assessment
Priority: Plan (action score 46/100)
- A ready-made attack module is public (Nuclei); exploiting it takes no special expertise.
- Probability of exploitation in the next 30 days: 73.9% (FIRST EPSS); higher than 99.4% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
- Fixed version: mod_md (AlmaLinux:8) 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa, 1:2.0.8-8.module_el8.5.0+2609+b30d9eec; apache2 (Alpine:v3.10) 2.4.41-r0; apache2 (Debian:10) 2.4.38-3+deb10u1.
- Mentioned 2 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Add it to your regular patch cycle. Upgrade to mod_md (AlmaLinux:8) 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa, 1:2.0.8-8.module_el8.5.0+2609+b30d9eec; apache2 (Alpine:v3.10) 2.4.41-r0; apache2 (Debian:10) 2.4.38-3+deb10u1 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
In Apache HTTP server 2.4.0 to 2.4.39, Redirects configured with mod_rewrite that were intended to be self-referential might be fooled by encoded newlines and redirect instead to an unexpected URL within the request URL.
- Published
- Sep 25, 2019
- Updated
- Jun 16, 2026
- EPSS
- 73.9% · 99th percentile
- CWE
- CWE-601
Report tools
Action score
46
Plan
Add it to your regular patch cycle.
- CVSS
- 24 / 40 · 6.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 22 / 30 · 73.9%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- Proof of concept exists, no weaponized module
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi 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 | http server | cpe:2.3:a:apache:http_server |
Using http server? Add it to your stack and be the first to know about CVEs like this one. (Apache HTTP)
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- apache http server2.4.0 and later · up to 2.4.39 inclusive
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 HTTP Server
- 2.4.0 to 2.4.39affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | mod_md | before 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa | 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa |
| AlmaLinux:8 | mod_md | before 1:2.0.8-8.module_el8.5.0+2609+b30d9eec | 1:2.0.8-8.module_el8.5.0+2609+b30d9eec |
| Alpine:v3.10 | apache2 | before 2.4.41-r0 | 2.4.41-r0 |
| Debian:10 | apache2 | before 2.4.38-3+deb10u1 | 2.4.38-3+deb10u1 |
| Debian:12 | apache2 | before 2.4.41-1 | 2.4.41-1 |
| Debian:8 | apache2 | before 2.4.10-10+deb8u15 | 2.4.10-10+deb8u15 |
| Debian:9 | apache2 | before 2.4.25-3+deb9u8 | 2.4.25-3+deb9u8 |
| openSUSE:Leap 15.0 | apache2 | before 2.4.33-lp151.8.6.1 | 2.4.33-lp151.8.6.1 |
| Red Hat:enterprise_linux:7::client | httpd | before 0:2.4.6-95.el7 | 0:2.4.6-95.el7 |
| Red Hat:enterprise_linux:7::client | httpd-debuginfo | before 0:2.4.6-95.el7 | 0:2.4.6-95.el7 |
| Red Hat:enterprise_linux:7::client | httpd-devel | before 0:2.4.6-95.el7 | 0:2.4.6-95.el7 |
| Red Hat:enterprise_linux:7::client | httpd-manual | before 0:2.4.6-95.el7 | 0:2.4.6-95.el7 |
| Red Hat:enterprise_linux:7::client | httpd-tools | before 0:2.4.6-95.el7 | 0:2.4.6-95.el7 |
| Red Hat:enterprise_linux:7::client | mod_ldap | before 0:2.4.6-95.el7 | 0:2.4.6-95.el7 |
| Red Hat:enterprise_linux:7::client | mod_proxy_html | before 1:2.4.6-95.el7 | 1:2.4.6-95.el7 |
| Red Hat:enterprise_linux:7::client | mod_session | before 0:2.4.6-95.el7 | 0:2.4.6-95.el7 |
| Red Hat:enterprise_linux:7::client | mod_ssl | before 1:2.4.6-95.el7 | 1:2.4.6-95.el7 |
| Red Hat:enterprise_linux:8::appstream | httpd | before 0:2.4.37-30.module+el8.3.0+7001+0766b9e7 | 0:2.4.37-30.module+el8.3.0+7001+0766b9e7 |
| Red Hat:enterprise_linux:8::appstream | httpd-debuginfo | before 0:2.4.37-30.module+el8.3.0+7001+0766b9e7 | 0:2.4.37-30.module+el8.3.0+7001+0766b9e7 |
| Red Hat:enterprise_linux:8::appstream | httpd-debugsource | before 0:2.4.37-30.module+el8.3.0+7001+0766b9e7 | 0:2.4.37-30.module+el8.3.0+7001+0766b9e7 |
| Red Hat:enterprise_linux:8::appstream | httpd-devel | before 0:2.4.37-30.module+el8.3.0+7001+0766b9e7 | 0:2.4.37-30.module+el8.3.0+7001+0766b9e7 |
| Red Hat:enterprise_linux:8::appstream | httpd-filesystem | before 0:2.4.37-30.module+el8.3.0+7001+0766b9e7 | 0:2.4.37-30.module+el8.3.0+7001+0766b9e7 |
| Red Hat:enterprise_linux:8::appstream | httpd-manual | before 0:2.4.37-30.module+el8.3.0+7001+0766b9e7 | 0:2.4.37-30.module+el8.3.0+7001+0766b9e7 |
| Red Hat:enterprise_linux:8::appstream | httpd-tools | before 0:2.4.37-30.module+el8.3.0+7001+0766b9e7 | 0:2.4.37-30.module+el8.3.0+7001+0766b9e7 |
+91
Same product
apache: all recordsOther highest-scoring records for the same primary product.
- CVE-2021-42013Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)KEV99Now
- CVE-2021-41773Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49KEV99Now
- CVE-2024-38475Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path.KEV96Now
- CVE-2019-0211In Apache HTTP Server 2.4 releases 2.4.17 to 2.4.38, with MPM event, worker or prefork, code executing in less-privileged child processes orKEV81Now
- CVE-2021-44790Possible buffer overflow when parsing multipart content in mod_lua of Apache HTTP Server 2.4.51 and earlier68This week
- CVE-2010-0425modules/arch/win32/mod_isapi.c in mod_isapi in the Apache HTTP Server 2.0.37 through 2.0.63, 2.2.0 through 2.2.14, and 2.3.x before 2.3.7, w68This week
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:mod_md | 1:2.0.8-8.module_el8.5.0+2609+b30d9eec · AlmaLinux:8 | Package registry (OSV) |
| alpine:apache2 | 2.4.41-r0 · Alpine:v3.10 | Package registry (OSV) |
| debian:apache2 | 2.4.41-1 · Debian:12 | Package registry (OSV) |
| opensuse:apache2 | 2.4.33-lp151.8.6.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| red hat:jbcs-httpd24-apr | 0:1.6.3-86.jbcs.el6 · Red Hat:jboss_core_services:1::el6 | Package registry (OSV) |
| red hat:jbcs-httpd24-apr-debuginfo | 0:1.6.3-86.jbcs.el6 · Red Hat:jboss_core_services:1::el6 | Package registry (OSV) |
| red hat:jbcs-httpd24-apr-devel | 0:1.6.3-86.jbcs.el6 · Red Hat:jboss_core_services:1::el6 | Package registry (OSV) |
| red hat:jbcs-httpd24-brotli | 0:1.0.6-21.jbcs.el6 · Red Hat:jboss_core_services:1::el6 | Package registry (OSV) |
| red hat:jbcs-httpd24-brotli-debuginfo | 0:1.0.6-21.jbcs.el6 · Red Hat:jboss_core_services:1::el6 | Package registry (OSV) |
| red hat:jbcs-httpd24-brotli-devel | 0:1.0.6-21.jbcs.el6 · Red Hat:jboss_core_services:1::el6 | Package registry (OSV) |
| red hat:jbcs-httpd24-httpd | 0:2.4.37-52.jbcs.el6 · Red Hat:jboss_core_services:1::el6 | Package registry (OSV) |
| red hat:jbcs-httpd24-httpd-debuginfo | 0:2.4.37-52.jbcs.el6 · Red Hat:jboss_core_services:1::el6 | Package registry (OSV) |
| red hat:jbcs-httpd24-httpd-devel | 0:2.4.37-52.jbcs.el6 · Red Hat:jboss_core_services:1::el6 | Package registry (OSV) |
| red hat:jbcs-httpd24-httpd-manual | 0:2.4.37-52.jbcs.el6 · Red Hat:jboss_core_services:1::el6 | Package registry (OSV) |
| red hat:jbcs-httpd24-httpd-selinux | 0:2.4.37-52.jbcs.el6 · Red Hat:jboss_core_services:1::el6 | Package registry (OSV) |
| red hat:jbcs-httpd24-httpd-tools | 0:2.4.37-52.jbcs.el6 · Red Hat:jboss_core_services:1::el6 | Package registry (OSV) |
| rocky linux:mod_md | 1:2.0.8-8.module+el8.5.0+695+1fa8055e · Rocky Linux:8 | Package registry (OSV) |
| suse:apache2 | 2.4.33-3.21.1 · SUSE:Linux Enterprise Module for Server Applications 15 | Package registry (OSV) |
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Exploit-DB entry ×1
- Nuclei detection template ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Nuclei detection template | Nuclei template CVE-2019-10098 | — |
| Exploit-DB entry | webapps | 2019-10-14 |
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.
- Published
- First PoC+18 d
- TodayOct 16, 2026+2578 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-21-0331 · Apr 21, 2021(Oracle Güvenlik Uyarısı Yayınladı)
- TR-19-118 · Aug 26, 2019(Apache httpd 2 Sunucu Güvenlik Güncellemesi)
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- low · data can be read
- Integrity
- low · data or configuration can be modified
- Availability
- none
Impact can extend beyond the vulnerable component (scope changes).
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality impact
- Low
- Integrity impact
- Low
- Availability impact
- None
Weakness class (CWE)
CWE-601 · URL Redirection to Untrusted Site ('Open Redirect')CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (16 more)Show less
- httpd.apache.org/security/vulnerabilities_24.html
- lists.apache.org/thread.html/r03ee478b3dda3e381fd6189366fa7af97c980d2f602846eef935277d%40%3Ccvs.httpd.apache.org%3E
- lists.apache.org/thread.html/r06f0d87ebb6d59ed8379633f36f72f5b1f79cadfda72ede0830b42cf%40%3Ccvs.httpd.apache.org%3E
- lists.apache.org/thread.html/r3c5c3104813c1c5508b55564b66546933079250a46ce50eee90b2e36%40%3Ccvs.httpd.apache.org%3E
- lists.apache.org/thread.html/r5d12ffc80685b0df1d6801e68000a7707dd694fe32e4f221de67c210%40%3Ccvs.httpd.apache.org%3E
- lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apache.org%3E
- lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E
- lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E
- lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E
- lists.apache.org/thread.html/rd2fb621142e7fa187cfe12d7137bf66e7234abcbbcd800074c84a538%40%3Ccvs.httpd.apache.org%3E
- lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E
- lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E
- www.oracle.com/security-alerts/cpuApr2021.html
- www.oracle.com/security-alerts/cpuapr2020.html
- www.oracle.com/security-alerts/cpujan2020.html
- www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.