Improper Authorization in baserCMS - CVE-2026-30878
Published: April 27, 2026
Vulnerability identifier: #VU128064
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-30878
CWE-ID: CWE-285
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to submit unauthorized mail form entries.
The vulnerability exists due to improper authorization in MailMessagesController.php::add() when handling public API mail submission requests. A remote attacker can send a specially crafted request to submit unauthorized mail form entries.
A valid CSRF cookie and token pair is required for exploitation.
Affected software
baserCMS
How to mitigate CVE-2026-30878
Install security update from vendor's website.
baserCMS - update to 5.2.3