Medium severity · published Mar 6, 2026
CVE-2026-30238
Group-Office: Reflected XSS in JavaScript context
6.1
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
groupoffice · Intermesh
< 6.8.155; < 25.0.88; < 26.0.10 · source: vendor
GR
Group-office · Intermesh
before 6.8.155; 25.0.1 before 25.0.88; 25.2.1 before 26.0.10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-30238
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-30238
Exploit
https://github.com/Intermesh/groupoffice/security/advisories/GHSA-7p2f-c33m-rv5v
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