All vulnerabilities
CVE-2026-109987

PixelYourSite (Free & Pro) - Unauthenticated Stored XSS via Cookie

Unknown PixelYourSite
Open in ThreatlineRecord JSON
CVSS
7.2High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.18%Chance of exploitation activity in the next 30 days, higher than 7% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in11.4.3Also 12.6.8CVE List
Published22 Oct 2026Updated 22 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 PixelYourSite WordPress plugin before 11.4.3, PixelYourSite Pro WordPress plugin before 12.6.8 do not sanitise and escape a cookie value before printing it into the page output, which, on a site running a full-page cache, allows unauthenticated attackers to store a Cross-Site Scripting payload in the cached page that is then served to other visitors.

Text from CVE List

Affected versions 2

  • PixelYourSiteaffected: all versions before 11.4.3CVE List
  • PixelYourSite Proaffected: all versions before 12.6.8CVE List

References 1