CVE-2025-10758 htmly Custom Field post cross site scripting
Remote attackers can inject malicious scripts via the Custom Field label, potentially leading to code execution or account takeover in htmly.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-10758?
CVE-2025-10758 is a medium-severity cross-site scripting vulnerability in htmly, published on 21 Sep 2025. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
A security vulnerability has been detected in htmly up to 3.1.0. The impacted element is an unknown function of the file /htmly/admin/field/post of the component Custom Field Handler. Such manipulation of the argument label leads to cross site scripting. The attack can be launched remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2025-10758?
It affects 1 product.
Products include Htmly Htmly.
How do I fix CVE-2025-10758?
No fix has been published for CVE-2025-10758 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-2025-10758 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-10758 exists.
Other vulnerabilities in htmly
Sources
Also known as GHSA-gpv9-9jfp-gcwv.