CVE-2025-48366 GroupOffice's Blind Stored XSS in Phone Number Field Enables Forced Redirect and Unauthorized Actions

Medium 6.9 Published 22 May 2025 Updated 22 May 2025

Attackers can inject persistent JavaScript into user phone fields, enabling forced redirects and unauthorized actions when victims view the Address Book.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-48366?

CVE-2025-48366 is a medium-severity cross-site scripting vulnerability in Intermesh groupoffice, published on 22 May 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.119 and 25.0.20, a stored and blind XSS vulnerability exists in the Phone Number field of the user profile within the GroupOffice application. This allows a malicious actor to inject persistent JavaScript payloads, which are triggered in the context of another user when they view the Address Book. Successful exploitation enables actions such as forced redirects, unauthorized fetch requests, or other arbitrary JavaScript execution without user interaction. Versions 6.8.119 and 25.0.20 contain a fix for the issue.

Weakness: CWE-87, CWE-79

Which versions are affected by CVE-2025-48366?

It affects 1 product.

Products include Intermesh Group-Office.

How do I fix CVE-2025-48366?

No fix has been published for CVE-2025-48366 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2025-48366 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-48366 exists.

Sources

Also known as GHSA-phhq-3h8f-qxpx.