CVE-2025-66391 Missing authorization in n/a
Read-only users can trigger password reset workflows, sending OTPs to attacker-controlled emails, enabling potential account takeover.
- 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-2025-66391?
CVE-2025-66391 is a high-severity missing authorization vulnerability in n/a, published on 17 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In Citrix Cloud through 2025-11-10, an account with read-only access can trigger the beginning of a workflow for write operations, e.g., the system will send a one-time password to an attacker-controlled email address when the attacker attempts to reset the password of a user account.
Weakness: CWE-284
Which versions are affected by CVE-2025-66391?
How do I fix CVE-2025-66391?
No fix has been published for CVE-2025-66391 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-66391 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-66391 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-gpmq-7782-jmhq.