CVE-2026-8626 SponsorMe <= 0.5.2 - Reflected Cross-Site Scripting via PHP_SELF Parameter
Unauthenticated attackers can inject arbitrary scripts via the PHP_SELF parameter in the SponsorMe WordPress plugin, requiring user interaction to execute.
- 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-2026-8626?
CVE-2026-8626 is a medium-severity cross-site scripting vulnerability in owencutajar SponsorMe, published on 20 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
The SponsorMe plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via PHP_SELF Parameter in all versions up to, and including, 0.5.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. The PHP_SELF value is reflected in two separate locations within the vulnerable function — a form action attribute and an anchor href attribute — both of which can be exploited by appending a crafted payload to the wp-admin/admin.php URL path.
Weakness: CWE-79
Which versions are affected by CVE-2026-8626?
How do I fix CVE-2026-8626?
No fix has been published for CVE-2026-8626 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-2026-8626 being exploited?
There is no known exploitation of CVE-2026-8626 in the wild and no public exploit code.
Sources
Also known as GHSA-rxxc-xr9w-xfp5.