CVE-2026-103481
Gwolle Guestbook <= 5.1.1 - Reflected Cross-Site Scripting via 'permalink' Parameter
mpol Gwolle Guestbook
CVSS
6.1MediumExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.21%Chance of exploitation activity in the next 30 days, higher than 10% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
What fixes it
No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.
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.
Text from CVE List
Affected versions 1
- Gwolle Guestbookaffected: all versions through 5.1.1CVE List
References 5
- codeberg.org/cyclotouriste/gwolle-gb/commit/f6e483654b56188a3fa208fd18a4f0468577a825Fixvia CVE List
- wordfence.com/threat-intel/vulnerabilities/id/d8eff266-43fe-4636-b4ef-c973db7e7952?source=cveReferencevia CVE List
- plugins.trac.wordpress.org/browser/gwolle-gb/tags/5.1.1/frontend/gb-permalink.php#L28Referencevia CVE List
- plugins.trac.wordpress.org/browser/gwolle-gb/tags/5.1.1/frontend/gb-permalink.php#L21Referencevia CVE List
- plugins.trac.wordpress.org/browser/gwolle-gb/tags/5.1.1/frontend/gb-ajax-infinite-scroll.php#L96Referencevia CVE List