What’s Vulnerable › Vulnerabilities
CVE-2021-26117: ActiveMQ: LDAP-Authentication does not verify passwords on servers with anonymous bind
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 11.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2021-01-27 · updated 2026-06-17
- Weakness: CWE-287
Description
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.
Affected products
- Apache ActiveMQ: from 5.15.0 before 5.15.14; from 5.16.0 before 5.16.1 — fixed in 5.15.14, 5.16.1
- Apache Software Foundation Apache ActiveMQ Artemis: before 2.16.0 — fixed in 2.16.0
- Debian Linux: 9.0
- NetApp OnCommand Workflow Automation: all versions
- Oracle Communications Element Manager: from 8.2.0 through 8.2.4.0
- Oracle Communications Session Report Manager: from 8.2.0 through 8.2.2
- Oracle Communications Session Route Manager: from 8.0.0 through 8.2.2
- Oracle Corporation FLEXCUBE Private Banking: 12.0.0, 12.1.0
How to fix
Upgrade to a fixed version: Apache ActiveMQ 5.15.14, 5.16.1; Apache Software Foundation Apache ActiveMQ Artemis 2.16.0. Check the vendor advisory for mitigations.
References
- https://lists.apache.org/thread.html/r110cacfa754471361234965ffe851a046e302ff2693b055f49f47b02%40%3Cissues.activemq.apache.org%3E
- https://lists.apache.org/thread.html/r22cdc0fb45e223ac92bc2ceff7af92f1193dfc614c8b248534456229%40%3Cissues.activemq.apache.org%3E
- https://lists.apache.org/thread.html/r3341d96d8f956e878fb7b463b08d57ca1d58fec9c970aee929b58e0d%40%3Cissues.activemq.apache.org%3E
- https://lists.apache.org/thread.html/r519bfafd67091d0b91243efcb1c49b1eea27321355ba5594f679277d%40%3Cissues.activemq.apache.org%3E
- https://lists.apache.org/thread.html/r5899ece90bcae5805ad6142fdb05c58595cff19cb2e98cc58a91f55b%40%3Cgitbox.activemq.apache.org%3E
- https://lists.apache.org/thread.html/r70389648227317bdadcdecbd9f238571a6047469d156bd72bb0ca2f7%40%3Cgitbox.activemq.apache.org%3E
- https://lists.apache.org/thread.html/r946488fb942fd35c6a6e0359f52504a558ed438574a8f14d36d7dcd7%40%3Ccommits.activemq.apache.org%3E
- https://lists.apache.org/thread.html/ra255ddfc8b613b80e9fa22ff3e106168b245f38a22316bfb54d21159%40%3Cissues.activemq.apache.org%3E
- https://lists.apache.org/thread.html/raea451de09baed76950d6a60cc4bb1b74476c505e03205a3c68c9808%40%3Cissues.activemq.apache.org%3E
- https://lists.apache.org/thread.html/rd05b1c9d61dbd220664d559aa0e2b55e5830f006a09e82057f3f7863%40%3Cissues.activemq.apache.org%3E
- https://lists.apache.org/thread.html/rd75600cee29cb248d548edcf6338fe296466d63a69e2ed0afc439ec7%40%3Cissues.activemq.apache.org%3E
- https://lists.apache.org/thread.html/re1b98da90a5f2e1c2e2d50e31c12e2578d61fe01c0737f9d0bd8de99%40%3Cannounce.apache.org%3E
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