All vulnerabilities
CVE-2026-91829

Subscribe to Comments < 2.3.3 - Reflected XSS via 'ref' Parameter

Unknown Subscribe to Comments
Open in ThreatlineRecord JSON
CVSS
7.1High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.16%Chance of exploitation activity in the next 30 days, higher than 5% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in2.3.3Fixed versionCVE List
Published11 Oct 2026Updated 11 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

The Subscribe to Comments WordPress plugin before 2.3.3 does not properly validate a parameter before reflecting it into a link target, allowing unauthenticated attackers to perform Reflected Cross-Site Scripting via a crafted URL against anyone who clicks it, including administrators.

Text from CVE List

Affected versions 1

  • Subscribe to Commentsaffected: all versions before 2.3.3CVE List

References 1