CVE-2025-30090 Cross-site scripting in SquirrelMail
Attackers can execute arbitrary JavaScript in victim browsers via crafted email headers in SquirrelMail, potentially leading to session hijacking or data theft.
- 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-2025-30090?
CVE-2025-30090 is a high-severity cross-site scripting vulnerability in SquirrelMail, published on 2 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
mime.php in SquirrelMail through 1.4.23-svn-20250401 and 1.5.x through 1.5.2-svn-20250401 allows XSS via e-mail headers, because JavaScript payloads are mishandled after $encoded has been set to true.
Weakness: CWE-79
Which versions are affected by CVE-2025-30090?
How do I fix CVE-2025-30090?
No fix has been published for CVE-2025-30090 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-2025-30090 being exploited?
There is no known exploitation of CVE-2025-30090 in the wild and no public exploit code.
Sources
Also known as GHSA-rj9p-v8v3-qjg9, UBUNTU-CVE-2025-30090.