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Fencer Vulns
medium 4.3

CVE-2009-2901 json

Improper Authentication in Apache Tomcat

published 2010-01-28 16 y ago modified 2026-06-16 4 mo ago also GHSA-hjfh-7c4v-7q8h , EUVD-2022-4169

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
8.1%
EPSS 8.1% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

The autodeployment process in Apache Tomcat 5.5.0 through 5.5.28 and 6.0.0 through 6.0.20, when autoDeploy is enabled, deploys appBase files that remain from a failed undeploy, which might allow remote attackers to bypass intended authentication requirements via HTTP requests.

Patch / fix

  • maven org.apache.tomcat:tomcat 5.5.29, 6.0.24

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2009-2901 updated

tomcat: insecure partial deploy after failed undeploy

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

8.12% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N

Affected packages

ecosystem package affected fixed in
maven org.apache.tomcat:tomcat
>=5.5.0, <5.5.29
>=6.0.0, <6.0.24
5.5.29
6.0.24

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls
  • CWE-287 Improper Authentication

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.