CVE-2026-29965 Cross-site scripting in n/a

Medium 6.1 Published 18 May 2026 Updated 18 May 2026

An attacker can execute arbitrary scripts in the victim's browser via the WarningUrlPage endpoint, 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: A user has to click or open something
Fix: None listed

What is CVE-2026-29965?

CVE-2026-29965 is a medium-severity cross-site scripting vulnerability in n/a, published on 18 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

HSC MailInspector 5.3.3-7 is vulnerable to Cross Site Scripting (XSS) in the /police/WarningUrlPage.php endpoint due to improper neutralization of user-supplied input that uses alternate or obfuscated JavaScript syntax.

Weakness: CWE-79

Which versions are affected by CVE-2026-29965?

It affects 1 product.

Products include Hsclabs Mailinspector.

How do I fix CVE-2026-29965?

No fix has been published for CVE-2026-29965 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-2026-29965 being exploited?

There is no known exploitation of CVE-2026-29965 in the wild and no public exploit code.

Sources

Also known as GHSA-qrv4-g78c-hphg.