CVE-2025-9431 mtons mblog search cross site scripting

Medium 5.3 Published Updated

Remote attackers can execute arbitrary scripts via the search keyword parameter in mtons mblog, potentially leading to session hijacking or malicious actions.

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-2025-9431?

CVE-2025-9431 is a medium-severity cross-site scripting vulnerability in mtons mblog, published on 26 Aug 2025. 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

A flaw has been found in mtons mblog up to 3.5.0. Impacted is an unknown function of the file /search. This manipulation of the argument kw causes cross site scripting. The attack can be initiated remotely. The exploit has been published and may be used.

Weakness: CWE-94, CWE-79

Which versions are affected by CVE-2025-9431?

It affects 1 product.

Products include Mtons Mblog.

How do I fix CVE-2025-9431?

No fix has been published for CVE-2025-9431 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-2025-9431 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-9431 exists.

Sources

Also known as GHSA-wvhw-4f88-xp55.

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