PT-2026-6303 · Unknown · Group-Office

Siefr3Dus · Published 2026-02-04 · Updated 2026-02-04 · CVE-2026-25511

Positive Technologies (AI Summary)

CVSS v4.0

8.2

High

Base vector

AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Group-Office versions prior to 6.8.150 Group-Office versions prior to 25.0.82 Group-Office versions prior to 26.0.5

Description An authenticated user with System Administrator privileges can trigger a server-side request forgery (SSRF) through the WOPI service discovery URL. This allows access to internal hosts and ports, and the response body can be exfiltrated using the built-in debug system, resulting in a visible SSRF and enabling full server-side file read.

Recommendations Update Group-Office to version 6.8.150 or later. Update Group-Office to version 25.0.82 or later. Update Group-Office to version 26.0.5 or later.

Exploit

Fix

SSRF

Weakness Enumeration

CWE-918

Related Identifiers

CVE-2026-25511

GHSA-R9V4-JM2R-R9PM

Affected Products

Group-Office

References · 7

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25511.json · Exploit
• 🔥 https://github.com/Intermesh/groupoffice/security/advisories/GHSA-r9v4-jm2r-r9pm · Exploit
• https://github.com/Intermesh/groupoffice/commit/5ac199dce758e1ce0d1cdb6905df5da3c2af42b3 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-25511 · Security Note
• https://osv.dev/vulnerability/CVE-2026-25511 · Vendor Advisory
• https://twitter.com/CVEnew/status/2019182766500508160 · Twitter Post
• https://t.me/CVEtracker/43769 · Telegram Post