CVE-2025-13970: CSRF in OpenPLC_V3

The CSRF vulnerability in OpenPLC_V3 poses a significant risk to systems relying on PLC automation. An attacker can leverage this flaw to trick an authenticated administrator into performing actions they did not intend. This could involve modifying PLC settings, uploading malicious programs, or executing arbitrary commands within the PLC environment. Successful exploitation could lead to disruption of industrial processes, damage to equipment, or even safety hazards, depending on the PLC's role in the system. The potential impact is amplified if the PLC controls critical infrastructure or safety-critical functions.

1. Reserved2025-12-03
2. Published2025-12-13
3. Modified2025-12-15
4. EPSS updated2026-03-23

The primary mitigation for CVE-2025-13970 is to upgrade OpenPLC_V3 to the version incorporating pull request #310, which includes the necessary CSRF validation. If immediate upgrade is not feasible, consider implementing temporary workarounds such as restricting access to PLC configuration interfaces, enforcing multi-factor authentication for administrative accounts, and carefully scrutinizing any links received via email or other external sources. Implementing a Web Application Firewall (WAF) with CSRF protection rules can also provide an additional layer of defense. After upgrading, confirm the fix by attempting to trigger a PLC configuration change via a crafted URL; the request should be rejected due to CSRF protection.