XSS in Pfefferle Webmention
CVE-2026-10513
The Webmention plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to and including 5.8.0 via parser-derived 'avatar' and 'url' author metadata. This is due to insufficient input sanitization and output escapin…
Vulnerability class: XSS (Cross-Site Scripting)
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.
Affected products
- Pfefferle Webmention — versions 0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-10513?
- CVE-2026-10513 is a high-severity vulnerability in Pfefferle Webmention, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-06-30.
- How severe is CVE-2026-10513?
- High severity. CVSS v3 base score is 7.2 out of 10.