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Fencer Vulns
high 7.5

CVE-2021-26117 in the critical feed json

ActiveMQ: LDAP-Authentication does not verify passwords on servers with anonymous bind

published 2021-01-27 5 y ago modified 2026-09-08 2 mo ago also BIT-activemq-2021-26117 , EUVD-2021-1304 , GHSA-9mgm-gcq8-86wq

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
11.3%
EPSS 11.3% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known

Summary

The optional ActiveMQ LDAP login module can be configured to use anonymous access to the LDAP server. In this case, for Apache ActiveMQ Artemis prior to version 2.16.0 and Apache ActiveMQ prior to versions 5.16.1 and 5.15.14, the anonymous context is used to verify a valid users password in error, resulting in no check on the password.

Patch / fix

  • maven org.apache.activemq:activemq-parent 5.15.14, 5.16.1
  • maven org.apache.activemq:apache-artemis 2.16.0
  • bitnami activemq 5.15.14, 5.16.1
  • Apache Software Foundation Apache ActiveMQ 2.16.0, 5.15.14, 5.16.1
  • activemq Debian 13, Debian 12 5.16.1-1

debian advisories DEBIAN-CVE-2021-26117

  • activemq Ubuntu Pro 16.04 LTS 5.13.2+dfsg-2ubuntu0.1~esm1
  • activemq Ubuntu Pro 18.04 LTS 5.15.8-2~18.04.1~esm1
  • activemq Ubuntu Pro 20.04 LTS 5.15.11-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2021-26117

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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-2021-26117 updated cvss 8.1

activemq: LDAP authentication bypass with anonymous bind

  • Red Hat AMQ
    fixed: vendor fix “There is currently no known mitigation for this issue.” RHSA-2020:4154
  • Red Hat Fuse/AMQ 6.3.18
    fixed: vendor fix “There is currently no known mitigation for this issue.” RHSA-2021:0384

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

11.33% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected packages

ecosystem package affected fixed in
maven org.apache.activemq:activemq-parent
>=5.16.0, <5.16.1
<5.15.14
5.16.1
5.15.14
maven org.apache.activemq:apache-artemis
<2.16.0
2.16.0
bitnami activemq
>=5.15.0, <5.15.14
>=5.16.0, <5.16.1
5.15.14
5.16.1

Affected products

  • Apache Software Foundation Apache ActiveMQ

Classification

Weakness

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.