CVE-2026-125389

EUVD-2026-120552
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.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
6.1 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 22.01%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources (CNA/ADP records, vendor advisories, Enginsight analysis).
VendorProductVersionSource
intermeshgroup-office
𝑥
< 6.8.181
CNA
intermeshgroup-office
25.0.0 ≤
𝑥
< 25.0.116
CNA
intermeshgroup-office
26.0.0 ≤
𝑥
< 26.0.58
CNA
Common Weakness Enumeration
References
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://github.com/Intermesh/groupoffice/security/advisories/GHSA-52gw-p4j3-v53c
https://www.vulncheck.com/advisories/group-office-before-6.8.181-25.0.116-and-26.0.58-stored-xss-via-filterxss-bypass