CVE-2025-12907
Published: 08 November 2025
Summary
CVE-2025-12907 is a high-severity Improper Input Validation (CWE-20) vulnerability in Google Chrome. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Client Execution (T1203); ranked at the 34.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly addresses the vulnerability by requiring timely identification, reporting, and patching of the input validation flaw in Chrome Devtools to prevent arbitrary code execution.
Mandates validation of untrusted inputs at system entry points, comprehensively mitigating the improper input validation (CWE-20) in Devtools exploited via user actions.
Ensures receipt and implementation of vendor security advisories, such as the Chrome stable channel update patching CVE-2025-12907, enabling proactive remediation.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
The vulnerability allows arbitrary code execution in Chrome's Devtools via insufficient input validation, directly enabling Exploitation for Client Execution (T1203) through user interaction with malicious content.
NVD Description
Insufficient validation of untrusted input in Devtools in Google Chrome prior to 140.0.7339.80 allowed a remote attacker to execute arbitrary code via user action in Devtools. (Chromium security severity: Low)
Deeper analysisAI
CVE-2025-12907 is an insufficient validation of untrusted input vulnerability affecting the Devtools component in Google Chrome versions prior to 140.0.7339.80. It stems from CWE-20 (Improper Input Validation) and enables a remote attacker to execute arbitrary code through user actions within Devtools. The issue carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H), though Chromium rates its security severity as Low.
A remote attacker with no privileges can exploit this vulnerability by tricking a user into performing specific actions in Chrome's Devtools interface, such as inspecting or interacting with malicious content. Successful exploitation grants high-impact arbitrary code execution with full confidentiality, integrity, and availability effects in the context of the browser, potentially leading to sandbox escape or further compromise depending on the attacker's payload.
Mitigation is addressed in the stable channel update for Chrome desktop, detailed in the Chrome Releases blog post at https://chromereleases.googleblog.com/2025/09/stable-channel-update-for-desktop.html, which includes the patch in version 140.0.7339.80. Additional technical details are available in the Chromium issue tracker at https://issues.chromium.org/issues/427367145. Users should update to the patched version promptly to prevent exploitation.
Details
- CWE(s)