CVE Catalog

CVE-2026-77140

HighCVSS 8.7
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.24%

15th percentile - higher than 15% of all known CVEs

Summary

The extension validates the HMAC of a frontend employee edit link only in the action that renders the edit form, not in the action that persists the change. An unauthenticated visitor who knows the UID of a visible employee record can send a direct POST request to the update action and overwrite that record without a valid edit link or any ownership check.

Risk Assessment

An attacker can modify employee data without authorization, potentially leading to data integrity issues and information disclosure.

Recommendation

Move HMAC validation to the write action to ensure every employee record update requires a valid edit link.

Related vulnerabilities

Original NVD description (English source)

The extension validates the HMAC of a frontend employee edit link only in the action that renders the edit form, not in the action that persists the change. An unauthenticated visitor who knows the UID of a visible employee record can send a direct POST request to the update action and overwrite that record without a valid edit link or any ownership check.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS