# CVE-2026-63010: Group-Office: Stored XSS via Manual Reminders

Status: published. Published: 2026-11-10. Updated: 2026-11-10.

Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.172, 25.0.108, and 26.0.33, a low-privileged user can create manual reminders containing arbitrary HTML/JavaScript and assign them to any other user (including administrators). When the victim's browser polls for pending notifications, the payload renders unsanitized as innerHTML in the ExtJS notification panel, achieving Stored Cross-Site Scripting (XSS) leading to full Account Takeover (ATO) of the victim's session. This issue has been patched in versions 6.8.172, 25.0.108, and 26.0.33.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Intermesh / groupoffice: < 6.8.172 (affected); < 25.0.108 (affected); < 26.0.33 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 4.0: 8.7 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-80, CWE-79

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/Intermesh/groupoffice/security/advisories/GHSA-jw34-6g49-r6cw (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/Intermesh/groupoffice/releases/tag/v25.0.108 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/Intermesh/groupoffice/releases/tag/v26.0.33 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/Intermesh/groupoffice/releases/tag/v6.8.172 (CNA: GitHub_M; x_refsource_MISC)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-63010; retrieved 2026-11-10; source updated 2026-11-10

Revision: aaabf9e56efc5c9590a4c2e0a50b8f2ceb4a0c978e480f3fc6f739d40ebc20cb

Canonical: https://y2.dev/cve/CVE-2026-63010

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