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CVE-2025-13465— Prototype Pollution Vulnerability in Lodash _.unset and _.omit functions

Quick assessment

Affected
Lodash Lodash
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

lodash是Lodash Utilities开源的一个JavaScript实用程序库。 lodash 4.17.22及之前版本存在安全漏洞，该漏洞源于_.unset和_.omit函数存在原型污染，可能导致攻击者删除全局原型的方法。

CVSS 6.9 · Medium EPSS 1.85% · P78

Affected Version Matrix 4

VendorProduct Version RangeStatus
Lodash Lodash 4.0.0≤ 4.17.22 affected
Lodash-amd Lodash-amd 4.0.0≤ 4.17.22 affected
lodash-es lodash-es 4.0.0≤ 4.17.22 affected
lodash.unset lodash.unset 4.0.0 affected
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I. Basic Information for CVE-2025-13465

Vulnerability Information
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Vulnerability Title
Prototype Pollution Vulnerability in Lodash _.unset and _.omit functions
Source: CVE Program / CVE List V5
Vulnerability Description
Lodash versions 4.0.0 through 4.17.22 are vulnerable to prototype pollution in the _.unset and _.omit functions. An attacker can pass crafted paths which cause Lodash to delete methods from global prototypes. The issue permits deletion of properties but does not allow overwriting their original behavior. This issue is patched on 4.17.23
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:H/SI:H/SA:H/E:P
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1321
Source: CVE Program / CVE List V5
Vulnerability Title
lodash 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
lodash是Lodash Utilities开源的一个JavaScript实用程序库。 lodash 4.17.22及之前版本存在安全漏洞，该漏洞源于_.unset和_.omit函数存在原型污染，可能导致攻击者删除全局原型的方法。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Lodash Lodash 4.0.0 ~ 4.17.22 -
Lodash-amd Lodash-amd 4.0.0 ~ 4.17.22 -
lodash-es lodash-es 4.0.0 ~ 4.17.22 -
lodash.unset lodash.unset 4.0.0 -

II. Public POCs for CVE-2025-13465

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Reproduction recording is a Pro+ exclusive
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claude_code · 4733 chars
GitHub 复现环境（可 clone 直接跑）
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2025-13465

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IV. Related Vulnerabilities

Same product: Lodash
Same vendor: Lodash
Same weakness: CWE-1321

V. Comments for CVE-2025-13465

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