PT-2025-39324 · Ts-Fns · Ts-Fns

Published 2025-09-24 · Updated 2025-09-24 · CVE-2025-57351

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

Name of the Vulnerable Software and Affected Versions ts-fns versions prior to 13.0.7

Description A prototype pollution issue exists due to inadequate validation of user-supplied keys within the assign function. This allows manipulation of the Object.prototype chain. Attackers can inject arbitrary properties into the global object's prototype, potentially causing application crashes, unexpected code execution, or bypassing security checks that rely on prototype integrity. The root cause is improper handling of deep property assignment operations within the library’s public API functions.

Recommendations Update to version 13.0.7 or later.

Exploit

Fix

Prototype Pollution

Weakness Enumeration

CWE-1321

Related Identifiers

CVE-2025-57351

GHSA-G7WQ-WGGW-VMHG

Affected Products

Ts-Fns

References · 8

• 🔥 https://github.com/VulnSageAgent/PoCs/tree/main/JavaScript/prototype-pollution/CVE-2025-57351 · Exploit
• https://osv.dev/vulnerability/CVE-2025-57351 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-g7wq-wggw-vmhg · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-57351 · Security Note
• https://github.com/tangshuang/ts-fns/issues/36 · Note
• https://github.com/tangshuang/ts-fns · Note
• https://twitter.com/CVEnew/status/1970996105380004141 · Twitter Post
• https://t.me/CVEtracker/33288 · Telegram Post