Vulnerability in Apache Openmeetings
CVE-2026-33266
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (22.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: -0.000
Affected products
- Apache Openmeetings
- Apache Software Foundation Openmeetings — versions 6.1.0
Weakness classification (CWE)
References
- lists.apache.org/thread/b05jnp9563v49zq494lox9kjbhhf2w66 (vendor-advisory, Mailing List, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-33266?
- CVE-2026-33266 is a high-severity vulnerability in Apache Openmeetings, classified under Use of Hard-coded Cryptographic Key. CVSS score: 7.5/10. Published 2026-04-09.
- How severe is CVE-2026-33266?
- High severity. CVSS v3 base score is 7.5 out of 10.