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TI-2026-84943 Aliases CVE-2026-104719GHSA-q9vr-qv9h-hj5f

Stored XSS in CookieYes WordPress plugin via cookie category scripts

Priority LOW 30CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Required
Attack complexity
High
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.

Summary

The CookieYes WordPress plugin before 3.5.8 does not restrict who can write its cookie-category script fields and does not sanitize or escape them. Users with the Contributor role can store JavaScript that runs in the browsers of site visitors and of an administrator reviewing the content, which is a cross-site scripting flaw (CWE-79). An attacker needs a Contributor account, and the victim must interact with the stored content.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

The CookieYes WordPress plugin before 3.5.8 does not correctly restrict who can write its cookie-category script fields, and does not sanitize or escape them, allowing users with the Contributor role to store JavaScript that executes in the browsers of site visitors and of an administrator reviewing the content.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00306 23rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed CookieYes (Unknown): 3.5.8

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
UnknownCookieYesbefore 3.5.83.5.8Patch availableCNA
  • CookieYes VendorUnknown Affected before 3.5.8 Fixed in 3.5.8 Patch available CNA

Remediation

Update CookieYes to version 3.5.8 or later. The sources do not list a vendor advisory for this fix.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

  • Fix · CNA CookieYes (Unknown) Fixed in 3.5.8

Timeline

  1. 2026-11-04 Threatist record created from CVE-2026-104719
  2. 2026-11-04 Alias added: GHSA-q9vr-qv9h-hj5f
  3. 2026-11-04 CVSS score added · CISA ADP
  4. 2026-11-04 Weakness changed · CISA ADP
  5. 2026-11-04 CISA SSVC decision points changed

References

Exploit 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences