CVE-2026-77114 danrossiter CVE debrief

Who should care

Defenders responsible for WordPress installations with the Document Gallery plugin should assess exposure and verify logging configuration to mitigate potential impacts. They should also review compensating controls for exposed systems, check relevant monitoring and logs, and track exceptions and retest remediated assets.

Why it matters

The vulnerability allows unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page, requiring logging to be enabled in the plugin's Advanced settings.

• Verify exposure and assess logging configuration
• Escalate to administrators if logging is not enabled
• Prioritize patching or mitigating the vulnerability

Technical summary

The Document Gallery plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'dg_thumber_webhook' Action Request Body in all versions up to, and including, 5.1.1 due to insufficient input sanitization and output escaping. This vulnerability allows unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page, requiring logging to be enabled in the plugin's Advanced settings for exploitation to occur. Defenders should prioritize verifying exposure and assessing logging configuration.

Defensive priority

Defenders should prioritize verifying exposure and assessing logging configuration in the plugin's Advanced settings.

Recommended defensive actions

• Verify the Document Gallery plugin version and configuration
• Assess logging configuration in the plugin's Advanced settings
• Escalate to administrators if logging is not enabled
• 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 source item provide details on the vulnerability, including the affected versions and the requirement for logging to be enabled. The plugin's Advanced settings control logging, which must be enabled for exploitation to occur. Defenders should verify the plugin version, assess logging configuration, and escalate to administrators if logging is not enabled.

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.