CVE-2026-27377 axiomthemes CVE debrief

Who should care

Defenders responsible for WordPress installations using the QuickCal plugin should assess the potential impact on their systems and verify the version in use.

Why it matters

The CVE-2026-27377 vulnerability in the QuickCal plugin requires verification of plugin versions and assessment of potential impact on WordPress installations.

• Verification of plugin version and potential exposure is necessary.
• Defenders should assess the impact on systems using the QuickCal plugin.

Technical summary

The QuickCal - Appointment Booking Calendar for WordPress plugin, version up to 1.0.16, is vulnerable to a broken access control issue. This could potentially allow attackers to access sensitive information or modify data under certain conditions. The vulnerability has a CVSS score of 6.7 and is classified as medium-severity.

Defensive priority

Defenders should prioritize verifying the version of the QuickCal plugin in use and assessing the potential impact on their systems.

Recommended defensive actions

• Verify the version of the QuickCal plugin in use and update to a patched version if necessary.
• Assess the potential impact on systems using the QuickCal plugin.

Evidence notes

The evidence provided is based on the CVE Program record and the NVD vulnerability detail page. However, the corpus is considered sparse as it only includes two resource links.

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.