Cross-site request forgery in Campaign Monitor - CVE-2026-126735
Published: November 12, 2026
Vulnerability identifier: #VU166067
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-126735
CWE-ID: CWE-352
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform cross-site request forgery attacks.
The vulnerability exists due to insufficient validation of the HTTP request origin on the admin routes. A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website.
Affected software
Campaign Monitor
How to mitigate CVE-2026-126735
Install updates from vendor's website.
Campaign Monitor - update to 3.0.3