What’s Vulnerable › Vulnerabilities

CVE-2026-25134: Group-Office Argument Injection in MaintenanceController::actionZipLanguage

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-02-02 · updated 2026-06-17
• Weakness: CWE-88

Description

Group-Office is an enterprise customer relationship management and groupware tool. Prior to 6.8.150, 25.0.82, and 26.0.5, the MaintenanceController exposes an action zipLanguage which takes a lang parameter and passes it directly to a system zip command via exec(). This can be combined with uploading a crafted zip file to achieve remote code execution. This vulnerability is fixed in 6.8.150, 25.0.82, and 26.0.5.

Affected products

• Intermesh groupoffice: before 6.8.150; from 25.0.1 before 25.0.82; from 26.0.1 before 26.0.5 — fixed in 25.0.82, 26.0.5, 6.8.150

How to fix

Upgrade to a fixed version: Intermesh groupoffice 25.0.82, 26.0.5, 6.8.150. Check the vendor advisory for mitigations.

References

• https://github.com/Intermesh/groupoffice/commit/d28490a6a29936db7888aa841ab8ade88800540b
• https://github.com/Intermesh/groupoffice/security/advisories/GHSA-v39j-549w-8849

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