Description
Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.156, 25.0.90, and 26.0.12, a vulnerability in the AbstractSettingsCollection model leads to insecure deserialization when these settings are loaded. By injecting a serialized FileCookieJar object into a setting string, an authenticated attacker can achieve Arbitrary File Write, leading directly to Remote Code Execution (RCE) on the server. This issue has been patched in versions 6.8.156, 25.0.90, and 26.0.12.
Affected products
intermesh: group-office
References4
- github.com/Intermesh/groupoffice/security/advisories/GHSA-h22j-… Vendor Advisory
- github.com/Intermesh/groupoffice/releases/tag/v25.0.90 Release Notes
- github.com/Intermesh/groupoffice/releases/tag/v26.0.12 Release Notes
- github.com/Intermesh/groupoffice/releases/tag/v6.8.156 Release Notes
Metrics
- CVSS 3.1
-
9.9
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 65 · as of 12 November 2026
- CWE
- CWE-502
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