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NVD / CVE Program· CNA apache

CVE-2021-25329: Incomplete fix for CVE-2020-9484

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 9.4% (FIRST EPSS); higher than 95.4% of all records.
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: tomcat9 (Debian:10) 9.0.31-1~deb10u4; tomcat9 (Debian:12) 9.0.43-1; tomcat8 (Debian:9) 8.5.54-0+deb9u6.
  • Mentioned 2 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to tomcat9 (Debian:10) 9.0.31-1~deb10u4; tomcat9 (Debian:12) 9.0.43-1; tomcat8 (Debian:9) 8.5.54-0+deb9u6 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

The fix for CVE-2020-9484 was incomplete. When using Apache Tomcat 10.0.0-M1 to 10.0.0, 9.0.0.M1 to 9.0.41, 8.5.0 to 8.5.61 or 7.0.0. to 7.0.107 with a configuration edge case that was highly unlikely to be used, the Tomcat instance was still vulnerable to CVE-2020-9494. Note that both the previously published prerequisites for CVE-2020-9484 and the previously published mitigations for CVE-2020-9484 also apply to this issue.

HighCVSS 7.0 · v3.1—No exploit Fix available
Published
Mar 1, 2021
Updated
Oct 8, 2026
EPSS
9.4% · 95th percentile
CWE
—

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
28 / 40 · 7.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
3 / 30 · 9.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

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.

Follow CVE-2021-25329

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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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.

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Affected 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.

VendorProduct
apachetomcat
debiandebian linux
oracleagile product lifecycle management
oraclecommunications cloud native core policy
oraclecommunications cloud native core security edge protection proxy
oraclecommunications instant messaging server
oracledatabase
oraclegraph server and client
oracleinstantis enterprisetrack
oraclemanaged file transfer
oraclemysql enterprise monitor
oraclesiebel ui framework

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • apache tomcat7.0.0 and later · up to 7.0.107 inclusive
  • apache tomcat8.5.0 and later · up to 8.5.61 inclusive
  • apache tomcat9.0.0 and later · up to 9.0.41 inclusive
  • apache tomcat10.0.0
  • apache tomcat9.0.0
  • debian debian linux10.0
  • debian debian linux9.0
  • oracle agile product lifecycle management9.3.3
  • oracle agile product lifecycle management9.3.6
  • oracle communications cloud native core policy1.14.0
  • oracle communications cloud native core security edge protection proxy1.6.0
  • oracle communications instant messaging server10.0.1.5.0
  • oracle database12.2.0.1
  • oracle database19c
  • oracle database21c
  • oracle graph server and clientbefore 21.3.0
  • oracle instantis enterprisetrack17.1
  • oracle instantis enterprisetrack17.2
  • oracle instantis enterprisetrack17.3
  • oracle managed file transfer12.2.1.3.0

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.

  • Apache Software Foundation Apache Tomcat

    • Apache Tomcat 10 and later · before 10.0.0affected
    • Apache Tomcat 9 and later · before 9.0.41affected
    • Apache Tomcat 8.5 and later · before 8.5.61affected
    • Apache Tomcat 7 and later · before 7.0.107affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:10tomcat9before 9.0.31-1~deb10u49.0.31-1~deb10u4
Debian:12tomcat9before 9.0.43-19.0.43-1
Debian:9tomcat8before 8.5.54-0+deb9u68.5.54-0+deb9u6
Mavenorg.apache.tomcat.embed:tomcat-embed-corefrom 10.0.0-M1 · before 10.0.210.0.2
Mavenorg.apache.tomcat.embed:tomcat-embed-corefrom 7.0.0 · before 7.0.1087.0.108
Mavenorg.apache.tomcat.embed:tomcat-embed-corefrom 8.0.0 · before 8.5.618.5.61
Mavenorg.apache.tomcat.embed:tomcat-embed-corefrom 9.0.0 · before 9.0.419.0.41
openSUSE:Leap 15.2tomcatbefore 9.0.36-lp152.2.22.19.0.36-lp152.2.22.1
Red Hat:jboss_enterprise_web_server:5.5::el7jws5-ecjbefore 0:4.12.0-3.redhat_2.2.el7jws0:4.12.0-3.redhat_2.2.el7jws
Red Hat:jboss_enterprise_web_server:5.5::el7jws5-mod_clusterbefore 0:1.4.3-2.Final_redhat_00002.1.el7jws0:1.4.3-2.Final_redhat_00002.1.el7jws
Red Hat:jboss_enterprise_web_server:5.5::el7jws5-mod_cluster-tomcatbefore 0:1.4.3-2.Final_redhat_00002.1.el7jws0:1.4.3-2.Final_redhat_00002.1.el7jws
Red Hat:jboss_enterprise_web_server:5.5::el7jws5-tomcatbefore 0:9.0.43-11.redhat_00011.1.el7jws0:9.0.43-11.redhat_00011.1.el7jws
Red Hat:jboss_enterprise_web_server:5.5::el7jws5-tomcat-admin-webappsbefore 0:9.0.43-11.redhat_00011.1.el7jws0:9.0.43-11.redhat_00011.1.el7jws
Red Hat:jboss_enterprise_web_server:5.5::el7jws5-tomcat-docs-webappbefore 0:9.0.43-11.redhat_00011.1.el7jws0:9.0.43-11.redhat_00011.1.el7jws
Red Hat:jboss_enterprise_web_server:5.5::el7jws5-tomcat-el-3.0-apibefore 0:9.0.43-11.redhat_00011.1.el7jws0:9.0.43-11.redhat_00011.1.el7jws
Red Hat:jboss_enterprise_web_server:5.5::el7jws5-tomcat-java-jdk11before 0:9.0.43-11.redhat_00011.1.el7jws0:9.0.43-11.redhat_00011.1.el7jws
Red Hat:jboss_enterprise_web_server:5.5::el7jws5-tomcat-java-jdk8before 0:9.0.43-11.redhat_00011.1.el7jws0:9.0.43-11.redhat_00011.1.el7jws
Red Hat:jboss_enterprise_web_server:5.5::el7jws5-tomcat-javadocbefore 0:9.0.43-11.redhat_00011.1.el7jws0:9.0.43-11.redhat_00011.1.el7jws
Red Hat:jboss_enterprise_web_server:5.5::el7jws5-tomcat-jsp-2.3-apibefore 0:9.0.43-11.redhat_00011.1.el7jws0:9.0.43-11.redhat_00011.1.el7jws
Red Hat:jboss_enterprise_web_server:5.5::el7jws5-tomcat-libbefore 0:9.0.43-11.redhat_00011.1.el7jws0:9.0.43-11.redhat_00011.1.el7jws
Red Hat:jboss_enterprise_web_server:5.5::el7jws5-tomcat-nativebefore 0:1.2.26-3.redhat_3.el7jws0:1.2.26-3.redhat_3.el7jws
Red Hat:jboss_enterprise_web_server:5.5::el7jws5-tomcat-native-debuginfobefore 0:1.2.26-3.redhat_3.el7jws0:1.2.26-3.redhat_3.el7jws
Red Hat:jboss_enterprise_web_server:5.5::el7jws5-tomcat-selinuxbefore 0:9.0.43-11.redhat_00011.1.el7jws0:9.0.43-11.redhat_00011.1.el7jws
Red Hat:jboss_enterprise_web_server:5.5::el7jws5-tomcat-servlet-4.0-apibefore 0:9.0.43-11.redhat_00011.1.el7jws0:9.0.43-11.redhat_00011.1.el7jws

+27

Same product

apache: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-24813Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUTKEV
    99Now
  • CVE-2016-8735Remote code execution is possible with Apache Tomcat before 6.0.48, 7.x before 7.0.73, 8.x before 8.0.39, 8.5.x before 8.5.7, and 9.x beforeKEV
    96Now
  • CVE-2017-12617When running Apache Tomcat versions 9.0.0.M1 to 9.0.0, 8.5.0 to 8.5.22, 8.0.0.RC1 to 8.0.46 and 7.0.0 to 7.0.81 with HTTP PUTs enabled (e.g.KEV
    92Now

Published before and after this one in the same product

  • ← EarlierCVE-2021-24122Jan 14, 2021 · Apache Tomcat information disclosure
    30Monitor
  • ← EarlierCVE-2021-25122Mar 1, 2021 · Apache Tomcat h2c request mix-up
    35Monitor
  • Later →CVE-2021-30639Jul 12, 2021 · DoS after non-blocking IO error
    32Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:tomcat88.5.54-0+deb9u6 · Debian:9Package registry (OSV)
debian:tomcat99.0.43-1 · Debian:12Package registry (OSV)
Maven:org.apache.tomcat.embed:tomcat-embed-core10.0.2Package registry (OSV)
Maven:org.apache.tomcat.embed:tomcat-embed-core7.0.108Package registry (OSV)
Maven:org.apache.tomcat.embed:tomcat-embed-core8.5.61Package registry (OSV)
Maven:org.apache.tomcat.embed:tomcat-embed-core9.0.41Package registry (OSV)
opensuse:tomcat9.0.36-lp152.2.22.1 · openSUSE:Leap 15.2Package registry (OSV)
red hat:jws5-ecj0:4.12.0-3.redhat_2.2.el7jws · Red Hat:jboss_enterprise_web_server:5.5::el7Package registry (OSV)
red hat:jws5-mod_cluster0:1.4.3-2.Final_redhat_00002.1.el7jws · Red Hat:jboss_enterprise_web_server:5.5::el7Package registry (OSV)
red hat:jws5-mod_cluster-tomcat0:1.4.3-2.Final_redhat_00002.1.el7jws · Red Hat:jboss_enterprise_web_server:5.5::el7Package registry (OSV)
red hat:jws5-tomcat0:9.0.43-11.redhat_00011.1.el7jws · Red Hat:jboss_enterprise_web_server:5.5::el7Package registry (OSV)
red hat:jws5-tomcat-admin-webapps0:9.0.43-11.redhat_00011.1.el7jws · Red Hat:jboss_enterprise_web_server:5.5::el7Package registry (OSV)
red hat:jws5-tomcat-docs-webapp0:9.0.43-11.redhat_00011.1.el7jws · Red Hat:jboss_enterprise_web_server:5.5::el7Package registry (OSV)
red hat:jws5-tomcat-el-3.0-api0:9.0.43-11.redhat_00011.1.el7jws · Red Hat:jboss_enterprise_web_server:5.5::el7Package registry (OSV)
red hat:jws5-tomcat-java-jdk110:9.0.43-11.redhat_00011.1.el7jws · Red Hat:jboss_enterprise_web_server:5.5::el7Package registry (OSV)
red hat:jws5-tomcat-java-jdk80:9.0.43-11.redhat_00011.1.el7jws · Red Hat:jboss_enterprise_web_server:5.5::el7Package registry (OSV)
red hat:jws5-tomcat-javadoc0:9.0.43-11.redhat_00011.1.el7jws · Red Hat:jboss_enterprise_web_server:5.5::el7Package registry (OSV)
red hat:jws5-tomcat-jsp-2.3-api0:9.0.43-11.redhat_00011.1.el7jws · Red Hat:jboss_enterprise_web_server:5.5::el7Package registry (OSV)
red hat:jws5-tomcat-lib0:9.0.43-11.redhat_00011.1.el7jws · Red Hat:jboss_enterprise_web_server:5.5::el7Package registry (OSV)
suse:tomcat9.0.36-3.64.1 · SUSE:OpenStack Cloud 9Package registry (OSV)
suse:tomcat66.0.53-0.57.19.1 · SUSE:Linux Enterprise Point of Sale 11 SP3Package registry (OSV)

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.

No history yet (it accumulates with the daily EPSS job).

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 researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

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.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (16 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records