7

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

Modified
AliasesSUSE-SU-2021:1431-1UBUNTU-CVE-2021-25329DEBIAN-CVE-2021-25329
Published 01-03-2021Last modified 08-10-2026

Vulnerability summary

CVE-2021-25329 is a high (CVSS 7.0) vulnerability in apache software foundation apache tomcat. EPSS estimates a 9.49% chance of exploitation in the next 30 days, higher than 95.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.0/10
010
High · v3.1 (NVD)
EPSS score
9.49%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 15 · Related 13
DLA-2594-1DSA-4891-1MGASA-2021-0357OPENSUSE-SU-2021:0496-1OPENSUSE-SU-2024:11468-1OPENSUSE-SU-2024:13441-1

Timeline

  1. 01-03-2021
    PublishedVulnerability first disclosed.
  2. 08-10-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

9.49%

Chance of exploitation in the next 30 days

Percentile

95%

Versus all other CVEs

30-day change

No change 0.00 pp

From 9.49% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Oracle10 products
Suse7 products
  • tomcat&distro=HPE Helion OpenStack 8< 8.0.53-29.46.1
  • tomcat&distro=SUSE Linux Enterprise Server 12 SP2-BCL< 8.0.53-29.46.1
  • tomcat&distro=SUSE Linux Enterprise Server 12 SP3-BCL< 8.0.53-29.46.1
  • tomcat&distro=SUSE Linux Enterprise Server 12 SP3-LTSS< 8.0.53-29.46.1
  • tomcat&distro=SUSE Linux Enterprise Server for SAP Applications 12 SP3< 8.0.53-29.46.1
Ubuntu4 products
  • tomcat6All versions (No fix recorded)
  • tomcat7< 7.0.52-1ubuntu0.16+esm1 | < 7.0.68-1ubuntu0.4+esm2 | < 7.0.78-1ubuntu0.1~esm1
  • tomcat8All versions (No fix recorded)
  • tomcat9< 9.0.16-3ubuntu0.18.04.2 | < 9.0.31-1ubuntu0.2
Debian2 products
Apache1 product
  • tomcatEOL≥ 7.0.0, ≤ 7.0.107 | ≥ 8.5.0, ≤ 8.5.61 | ≥ 9.0.0, ≤ 9.0.41 | 9.0.0:milestone1 | 9.0.0:milestone10 | 9.0.0:milestone11 | 9.0.0:milestone12 | 9.0.0:milestone13 | 9.0.0:milestone14 | 9.0.0:milestone15 | 9.0.0:milestone16 | 9.0.0:milestone17 | 9.0.0:milestone18 | 9.0.0:milestone19 | 9.0.0:milestone2 | 9.0.0:milestone20 | 9.0.0:milestone21 | 9.0.0:milestone22 | 9.0.0:milestone23 | 9.0.0:milestone24 | 9.0.0:milestone25 | 9.0.0:milestone26 | 9.0.0:milestone27 | 9.0.0:milestone3 | 9.0.0:milestone4 | 9.0.0:milestone5 | 9.0.0:milestone6 | 9.0.0:milestone7 | 9.0.0:milestone8 | 9.0.0:milestone9 | 10.0.0 | 10.0.0:milestone1 | 10.0.0:milestone10 | 10.0.0:milestone2 | 10.0.0:milestone3 | 10.0.0:milestone4 | 10.0.0:milestone5 | 10.0.0:milestone6 | 10.0.0:milestone7 | 10.0.0:milestone8 | 10.0.0:milestone9
Apache software foundation1 product
  • apache tomcat≥ Apache Tomcat 10, < 10.0.0 | ≥ Apache Tomcat 9, < 9.0.41 | ≥ Apache Tomcat 8.5, < 8.5.61 | ≥ Apache Tomcat 7, < 7.0.107
Org.apache.tomcat.embed1 product
  • tomcat-embed-core≥ 10.0.0-M1, < 10.0.2 | ≥ 9.0.0, < 9.0.41 | ≥ 8.0.0, < 8.5.61 | ≥ 7.0.0, < 7.0.108

7 vendors · 26 products

References

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