Reflected Cross-Site Scripting in Gwolle Guestbook Plugin for WordPress
CVE-2026-103481

6.1MEDIUM

Key Information:

Vendor

WordPress
Status
Gwolle Guestbook
Vendor
CVE Published:
16 October 2026

What is CVE-2026-103481?

The Gwolle Guestbook plugin for WordPress has a critical vulnerability that allows reflected cross-site scripting via the 'permalink' parameter. This vulnerability affects all versions up to and including 5.1.1, stemmed from inadequate input sanitization and output escaping. Attackers can exploit this flaw to inject malicious scripts into web pages, potentially compromising user interactions when they click on manipulated links or follow other deceptive prompts.

Affected Version(s)

Gwolle Guestbook 0 <= 5.1.1

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/gwolle-gb/tags...
https://plugins.trac.wordpress.org/browser/gwolle-gb/tags...

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

crow
.