CVE-2026-77997 yootheme.com CVE debrief

Who should care

Joomla site administrators, security teams, and users with com_template editing permissions should assess exposure to this vulnerability and apply patches or updates as necessary to prevent potential data leakage and unauthorized access. This vulnerability may impact organizations that use YOOtheme Pro in their Joomla installations, particularly those with users who have com_template editing permissions.

Why it matters

CVE-2026-77997 is a medium-severity vulnerability in YOOtheme Pro that allows users with com_template editing permissions to access arbitrary module information without proper authorization. Joomla site administrators and security teams should assess exposure, verify user permissions, and apply patches to prevent potential data leakage and unauthorized access.

• Potential unauthorized access to module information.
• Possible data leakage due to missing access controls.
• Need for verification of user permissions and access controls.
• Requirement for patching or updating YOOtheme Pro to prevent exploitation.

Technical summary

The YOOtheme Pro Joomla Extension has a vulnerability (CVE-2026-77997) allowing users with com_template editing permissions to access information about arbitrary modules without the respective com_modules permissions. This issue exists in versions 1.0.0 through 5.0.41 of the extension. The vulnerability has a medium severity and is being tracked by CVE-2026-77997. Joomla site administrators and security teams should assess exposure to this vulnerability and apply patches or updates as necessary to prevent potential data leakage and unauthorized access.

Defensive priority

Medium priority for Joomla site administrators and security teams to assess exposure and apply patches.

Recommended defensive actions

• Assess exposure of YOOtheme Pro installations to this vulnerability.
• Verify if the installed version of YOOtheme Pro is within the affected range (1.0.0-5.0.41).
• Apply patches or updates provided by the vendor to fix the missing access check issue.
• Review user permissions and access controls for com_template and com_modules in Joomla.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• 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 in YOOtheme Pro 1.0.0-5.0.41. The NVD entry is currently Deferred. There is limited information available about the specific details of the vulnerability, and defenders should verify the affected scope and severity with the vendor or other trusted sources. The CVE record was published on 2026-08-25T12:16:26.167Z and has not been modified since then.

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.