Quick answers
- Is CVE-2026-125389 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-125389 being exploited in the wild.
- How severe is CVE-2026-125389?
- Medium severity, with a CVSS score of 6.1, published 10 November 2026.
- Which products and versions are affected?
- Intermesh Group-Office before 6.8.181, 25.0.116, and 26.0.58.
- Is there a fix for CVE-2026-125389?
- Yes: fixed in 6.8.181, 25.0.116, 26.0.58. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- Am I affected by CVE-2026-125389?
- Check whether you run Intermesh Group-Office at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 6.8.181, 25.0.116, 26.0.58
Technical details
The vulnerability is a stored cross-site scripting (XSS) flaw in the email viewer caused by a flawed regex in StringHelper::filterXSS(). Remote attackers can send emails with SVG/onload event handlers or other script tags that bypass the sanitization filter and are rendered raw by MessagePanel.js, executing arbitrary JavaScript in the recipient's browser context. The fix replaces regex-based sanitization with DOM-based HTML parsing to properly strip event handlers and script elements.
Affected products
- Intermesh Group-Office before 6.8.181, 25.0.116, and 26.0.58