CVE-2025-62763 Server-side request forgery in Collaboration
Attackers can exploit SSRF in the chat proxy configuration to access internal resources or bypass security controls in Zimbra Collaboration.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-62763?
CVE-2025-62763 is a medium-severity server-side request forgery vulnerability in Zimbra Collaboration, published on 21 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Zimbra Collaboration (ZCS) before 10.1.12 allows SSRF because of the configuration of the chat proxy.
Weakness: CWE-918
Which versions are affected by CVE-2025-62763?
How do I fix CVE-2025-62763?
No fix has been published for CVE-2025-62763 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2025-62763 being exploited?
There is no known exploitation of CVE-2025-62763 in the wild and no public exploit code.
Sources
Also known as GHSA-2928-r2w9-gm4x.