CVE-2025-54982 SAML 2.0 Public Key Validation Issue
Attackers can bypass SAML authentication due to improper cryptographic signature verification, potentially gaining unauthorized access to the Zscaler Authentication Server.
- 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-2025-54982?
CVE-2025-54982 is a critical authentication bypass vulnerability in Zscaler Authentication Server, published on 5 Aug 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An improper verification of cryptographic signature in Zscaler's SAML authentication mechanism on the server-side allowed an authentication abuse.
Weakness: CWE-347
Which versions are affected by CVE-2025-54982?
How do I fix CVE-2025-54982?
No fix has been published for CVE-2025-54982 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-54982 being exploited?
There is no known exploitation of CVE-2025-54982 in the wild and no public exploit code.
Sources
Also known as GHSA-84x5-5f67-wjp4.