CVE-2026-109191 extendthemes CVE debrief

Who should care

WordPress administrators and defenders responsible for managing plugins and user access should assess exposure and prioritize remediation. They should review the vulnerability details, verify the presence of vulnerable plugin versions, and ensure that appropriate measures are taken to prevent exploitation. This includes updating the plugin, restricting access to sensitive API credentials, and monitoring for suspicious activity.

Why it matters

CVE-2026-109191 is a Sensitive Information Exposure vulnerability in the Image Hub plugin for WordPress. Authenticated attackers with subscriber-level access can extract plaintext API credentials for third-party services and overwrite stored API credential options. Defenders should prioritize verifying exposure and remediating vulnerable installations.

• Authenticated attackers with subscriber-level access can extract sensitive API credentials.
• Attackers can overwrite stored API credential options using the image_hub_update_settings AJAX handler.
• Defenders must verify and update the Image Hub plugin to prevent exploitation.
• Remediation priority is high due to the potential for credential exposure and overwriting.

Technical summary

The Image Hub plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to and including 1.2.0. The vulnerability is caused by the emission of plaintext API credentials for six third-party services into every admin page's HTML via wp_localize_script. Additionally, the absence of capability checks in the image_hub_update_settings AJAX handler allows attackers to overwrite stored API credential options.

Defensive priority

Defenders should prioritize verifying exposure and remediating vulnerable installations.

Recommended defensive actions

• Verify and update the Image Hub plugin to a version beyond 1.2.0.
• Restrict access to sensitive API credentials.
• Monitor for suspicious AJAX requests.
• 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 vulnerability allows authenticated attackers with subscriber-level access to extract plaintext API credentials for six third-party services and overwrite stored API credential options via AJAX nonce.

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.