CVE-2026-91829 Subscribe to Comments < 2.3.3 - Reflected XSS via 'ref' Parameter
Unauthenticated attackers can execute arbitrary scripts in victim browsers via a crafted URL, potentially compromising administrator accounts.
- 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-2026-91829?
CVE-2026-91829 is a high-severity cross-site scripting vulnerability in Unknown Subscribe to Comments, published on 11 Oct 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
The Subscribe to Comments WordPress plugin before 2.3.3 does not properly validate a parameter before reflecting it into a link target, allowing unauthenticated attackers to perform Reflected Cross-Site Scripting via a crafted URL against anyone who clicks it, including administrators.
Weakness: CWE-79
Which versions are affected by CVE-2026-91829?
How do I fix CVE-2026-91829?
No fix has been published for CVE-2026-91829 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-2026-91829 being exploited?
There is no known exploitation of CVE-2026-91829 in the wild and no public exploit code.
Sources
Also known as GHSA-prwf-5jq7-v6fg.