CVE-2025-40933 Apache::AuthAny::Cookie v0.201 or earlier for Perl generates session ids insecurely
Insecure session ID generation in Apache::AuthAny::Cookie allows attackers to predict IDs and potentially take over user accounts.
- 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-2025-40933?
CVE-2025-40933 is a high-severity vulnerability in KGOLDOV Apache::AuthAny, published on 17 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Apache::AuthAny::Cookie v0.201 or earlier for Perl generates session ids insecurely.
Session ids are generated using an MD5 hash of the epoch time and a call to the built-in rand function. The epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.
Predicable session ids could allow an attacker to gain access to systems.
Which versions are affected by CVE-2025-40933?
How do I fix CVE-2025-40933?
No fix has been published for CVE-2025-40933 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-40933 being exploited?
There is no known exploitation of CVE-2025-40933 in the wild and no public exploit code.
Sources
Also known as GHSA-gvxx-2pm7-7h2r.