CVE-2026-4559 wpchill CVE debrief

Who should care

Defenders responsible for WordPress installations with the Image Photo Gallery Final Tiles Grid plugin should assess exposure and prioritize verification and potential updates. This includes reviewing plugin versions, configurations, and monitoring for suspicious activity. Additionally, defenders should consider implementing additional security measures to prevent cross-site scripting attacks and review compensating controls for exposed systems.

Why it matters

The Image Photo Gallery Final Tiles Grid plugin for WordPress is vulnerable to Stored Cross-Site Scripting, allowing authenticated attackers to inject arbitrary web scripts. Defenders should prioritize verification and potential updates.

• Authenticated attackers with Contributor-level access and above can inject arbitrary web scripts
• Injected scripts can execute on pages accessed by users
• Defenders should verify and update the plugin to a patched version, if available

Technical summary

The Image Photo Gallery Final Tiles Grid plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'delay' shortcode attribute in all versions up to, and including, 3.6.12 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Defensive priority

Defenders should prioritize verifying and updating the plugin to a patched version, if available, and monitor for potential exploitation attempts.

Recommended defensive actions

• Verify and update the plugin to a patched version, if available
• Monitor for potential exploitation attempts
• Implement additional security measures to prevent cross-site scripting attacks
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD vulnerability detail page provide information on the vulnerability. However, the scope of affected versions and potential exploitation attempts are not explicitly stated. Defenders should verify plugin versions and configurations, review logs for suspicious activity, and consider implementing additional security measures to prevent cross-site scripting attacks. The vulnerability details suggest that the plugin's input sanitization and output escaping mechanisms are insufficient, allowing attackers to inject web

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.