Vulnerability · Published Mar 6, 2026 · Assigned by GitHub_M

CVE-2026-30238Group-Office: Reflected XSS in JavaScript context

Medium 5.1

In plain English

A medium-severity cross-site scripting in groupoffice from Intermesh. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities).

Severity (CVSS 4.0)5.1Medium

Exploit odds (30 days)0.3%top 75.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.155, 25.0.88, and 26.0.10, there is a reflected XSS vulnerability in GroupOffice on the external/index flow. The f parameter (Base64 JSON) is decoded and then injected into an inline JavaScript block without strict escaping, allowing </script><script>...</script> injection and arbitrary JavaScript execution in the victim's browser. This issue has been patched in versions 6.8.155, 25.0.88, and 26.0.10.

Affected products (as reported)

Vendor	Product	Versions
Intermesh	groupoffice	< 6.8.155< 25.0.88< 26.0.10

Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

References

https://github.com/Intermesh/groupoffice/security/advisories/GHSA-7p2f-c33m-rv5v x_refsource_CONFIRM