CVE-2026-103481
The Gwolle Guestbook plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'permalink' parameter in all versions up to, and including, 5.1.1 due to insufficient input sanitization and output escaping.
Does this matter?
Lower severity and a low EPSS score (0.21%). Track it; it rarely justifies an emergency change on its own.
Description
The Gwolle Guestbook plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'permalink' parameter in all versions up to, and including, 5.1.1 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.
- CVSS 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 0.21% probability · 11th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Source
- security@wordfence.com
EPSS moved from 0.2% on 16 October 2026 to 0.2% on 26 October 2026.
References
- https://codeberg.org/cyclotouriste/gwolle-gb/commit/f6e483654b56188a3fa208fd18a4f0468577a825
- https://plugins.trac.wordpress.org/browser/gwolle-gb/tags/5.1.1/frontend/gb-ajax-infinite-scroll.php#L96
- https://plugins.trac.wordpress.org/browser/gwolle-gb/tags/5.1.1/frontend/gb-permalink.php#L21
- https://plugins.trac.wordpress.org/browser/gwolle-gb/tags/5.1.1/frontend/gb-permalink.php#L28
- https://www.wordfence.com/threat-intel/vulnerabilities/id/d8eff266-43fe-4636-b4ef-c973db7e7952?source=cve
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.