CVE-2025-27823 Cross-site scripting in Mail Disguise
An attacker with link insertion privileges can execute arbitrary scripts via insufficient validation of data attributes in the Mail Disguise module.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-27823?
CVE-2025-27823 is a medium-severity cross-site scripting vulnerability in backdropcms Mail Disguise, published on 7 Mar 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An issue was discovered in the Mail Disguise module before 1.x-1.0.5 for Backdrop CMS. It enables a website to obfuscate email addresses, and should prevent spambots from collecting them. The module doesn't sufficiently validate the data attribute value on links, potentially leading to a Cross Site Scripting (XSS) vulnerability. This is mitigated by the fact an attacker must be able to insert link (<a>) HTML elements containing data attributes into the page.
Weakness: CWE-79
Which versions are affected by CVE-2025-27823?
How do I fix CVE-2025-27823?
No fix has been published for CVE-2025-27823 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-2025-27823 being exploited?
There is no known exploitation of CVE-2025-27823 in the wild and no public exploit code.
Sources
Also known as GHSA-6fhq-fgj9-wmh6.