CVE-2026-19797 User Access Manager CVE debrief

Who should care

WordPress administrators and defenders responsible for managing plugins and user access should assess exposure and prioritize patching or mitigation efforts. They should verify the presence of this vulnerability in their WordPress installations, assess exposure of administrative users, and apply patches or updates as available.

Why it matters

CVE-2026-19797 is a Reflected Cross-Site Scripting vulnerability in the User Access Manager plugin for WordPress. Defenders should prioritize verifying the presence of this vulnerability, assessing exposure of administrative users, and applying patches or updates as available. The vulnerability has a CVSS score of 6.1 and MEDIUM severity.

• Defenders must verify the presence of this vulnerability in their WordPress installations.
• Exposure of administrative users to Reflected Cross-Site Scripting could lead to unauthorized actions.
• Successful exploitation requires tricking a user into performing an action such as clicking on a link.
• Remediation priority is medium due to the CVSS score of 6.1 and MEDIUM severity.

Technical summary

The User Access Manager plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'tab_group_section' parameter in all versions up to, and including, 2.3.18. This is due to insufficient input sanitization and output escaping, allowing unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Defensive priority

Defenders should prioritize verifying the presence of this vulnerability in their WordPress installations and assess exposure of administrative users.

Recommended defensive actions

• Verify the presence of the User Access Manager plugin version 2.3.18 or earlier in your WordPress installations.
• Assess exposure of administrative users to the Reflected Cross-Site Scripting vulnerability.
• Apply patches or updates to the User Access Manager plugin as available.
• Monitor for potential exploitation attempts targeting this vulnerability.
• 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.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its CVSS score of 6.1 and MEDIUM severity. The vulnerability is caused by insufficient input sanitization and output escaping in the User Access Manager plugin. The CVE record was published on 2026-09-09T04:17:57.307Z and has not been modified since then. The NVD entry provides additional information on the vulnerability, including its potential impact and mitigation strategies.

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.