Mitigation Strategies

Immediate mitigation steps include applying the Patchstack mitigation rule designed to block attacks exploiting this vulnerability until an official patch is released.

Users should update the UiPress lite plugin to a patched version as soon as it becomes available.

In the meantime, seek assistance from your hosting provider or web developer to implement protective measures.

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Executive Summary

CVE-2026-27091 is a Missing Authorization vulnerability in the WordPress UiPress lite plugin versions up to and including 3.5.09. It is a Broken Access Control issue caused by missing authorization, authentication, or nonce token checks in certain plugin functions.

This flaw allows unprivileged users, such as subscribers or developers, to perform actions that normally require higher privileges, potentially compromising the security of the affected website.

The vulnerability falls under the OWASP Top 10 category A1: Broken Access Control and has a medium severity with a CVSS score of 6.3.

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Impact Analysis

This vulnerability can allow attackers with low-level privileges (such as subscribers or developers) to perform unauthorized actions that require higher privileges, potentially leading to unauthorized access or modification of website data.

Such exploitation can compromise the integrity, confidentiality, and availability of the affected WordPress site.

Additionally, this vulnerability is commonly targeted in mass campaigns affecting many websites regardless of their traffic or popularity.

Currently, no official patch is available, but mitigation rules from Patchstack can help block attacks until a patch is released.

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Compliance Impact

I don't know

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Detection Guidance

The vulnerability arises from missing authorization and authentication checks in the UiPress lite WordPress plugin, allowing lower-privileged users to perform higher-privilege actions.

There is no specific detection command or signature provided in the available resources.

To detect exploitation attempts, monitoring for unusual access patterns or unauthorized actions performed by subscriber or developer roles within the WordPress site may help.

Additionally, applying web application firewall (WAF) rules, such as those provided by Patchstack, can help detect and block exploit attempts.

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