Intermesh Group-Office before 6.8.181, 25.0.116, and 26.0.58 contains a stored cross-site scripting vulnerability in the email viewer due…
CVE-2026-125389
Intermesh Group-Office before 6.8.181, 25.0.116, and 26.0.58 contains a stored cross-site scripting vulnerability in the email viewer due to a flawed regex in StringHelper::filterXSS. Remote attackers can send emails containing tags like svg/onload, which MessagePanel.js renders raw, executing script in the recipient's session when opened.
Assessment
- CVSS
- 5.3 (v4.0)
- Severity
- Medium
- Known exploited
- Not listed in CISA KEV
- Exploit availability
- Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
- Published
- 9 November 2026
- Last updated
- 9 November 2026
- Affected
- Intermesh · Group-Office
- Assigner
- VulnCheck
CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
At the source
References
- https://github.com/Intermesh/groupoffice/security/advisories/GHSA-52gw-p4j3-v53c
- https://github.com/Intermesh/groupoffice/blob/v26.0.57/www/go/base/util/StringHelper.php#L799
- https://github.com/Intermesh/groupoffice/commit/8e9ff58807c5cfa71a34a48d80410479c1e7f9f5
- https://github.com/Intermesh/groupoffice/commit/bfc1fba43de53a6f662b1a12e31447a9c65d4d00
- https://github.com/Intermesh/groupoffice/commit/f32e9674b162342f0e4a43932f4adaf03e97c755
- https://www.vulncheck.com/advisories/group-office-before-6.8.181-25.0.116-and-26.0.58-stored-xss-via-filterxss-bypass
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