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Vulnerability record · CVE-2026-33266 · published 9 April 2026

CVE-2026-33266: Apache openmeetings vulnerability

Apache · Openmeetings

Use of Hard-coded Cryptographic Key vulnerability in Apache OpenMeetings. The remember-me cookie encryption key is set to default value in openmeetings.properties and not being auto-rotated. In case OM admin hasn't changed the default encryption key, an attacker who has stolen a cookie from a logged-in user can get full user credentials. This issue affects Apache OpenMeetings: from 6.1.0 before 9.0.0. Users are recommended to upgrade to version 9.0.0, which fixes the issue.

7.5 CVSS 3.1 High EPSS 0.35% · top 74.6% CWE-321 · CWE-321
7.5CVSS 3.1 base score
0.35%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Use of Hard-coded Cryptographic Key vulnerability in Apache OpenMeetings. The remember-me cookie encryption key is set to default value in openmeetings.properties and not being auto-rotated. In case OM admin hasn't changed the default encryption key, an attacker who has stolen a cookie from a logged-in user can get full user credentials. This issue affects Apache OpenMeetings: from 6.1.0 before 9.0.0. Users are recommended to upgrade to version 9.0.0, which fixes the issue.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://lists.apache.org/thread/b05jnp9563v49zq494lox9kjbhhf2w66 Mailing ListVendor Advisory
http://www.openwall.com/lists/oss-security/2026/04/09/11 Mailing ListThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2017-7664Apache openmeetings xml external entity (xxe) vulnerabilityUploaded XML documents were not correctly validated in Apache OpenMeetings 3.1.0.EPSS 2.3%9.8CVE-2024-54676Apache OpenMeetings OpenJPA deserialization of untrusted dataApache OpenMeetings versions from 2.1.0 before 8.0.0 ship default clustering instructions that omit OpenJPA serialization class white/black lists, al…EPSS 65%analysed9.8CVE-2023-28326Apache openmeetings missing authentication for critical function vulnerabilityVendor: The Apache Software Foundation Versions Affected: Apache OpenMeetings from 2.0.0 before 7.0.0 Description: Attacker can elevate their privile…EPSS 1.3%9.8CVE-2016-8736Apache openmeetings deserialization of untrusted data vulnerabilityApache OpenMeetings before 3.1.2 is vulnerable to Remote Code Execution via RMI deserialization attack.EPSS 4.8%9.8CVE-2017-7673Apache openmeetings improper restriction of authentication attempts vulnerabilityApache OpenMeetings 1.0.0 uses not very strong cryptographic storage, captcha is not used in registration and forget password dialogs and auth forms …EPSS 1.6%8.8CVE-2017-7666Apache openmeetings cross-site scripting vulnerabilityApache OpenMeetings 1.0.0 is vulnerable to Cross-Site Request Forgery (CSRF) attacks, XSS attacks, click-jacking, and MIME based attacks.EPSS 0.80%8.8CVE-2017-7681Apache openmeetings sql injection vulnerabilityApache OpenMeetings 1.0.0 is vulnerable to SQL injection. This allows authenticated users to modify the structure of the existing query and leak the …EPSS 1.3%8.2CVE-2017-7682Apache openmeetings vulnerabilityApache OpenMeetings 3.2.0 is vulnerable to parameter manipulation attacks, as a result attacker has access to restricted areas.EPSS 1.6%

Source: NIST National Vulnerability Database (record CVE-2026-33266), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.