Prototype Pollution in Lodash
CVE-2025-13465
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
Vulnerability class: Prototype Pollution
EPSS: 0.015 (72.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Lodash — versions 4.0.0
- Lodash-amd — versions 4.0.0
- Lodash-es — versions 4.0.0
- Lodash.unset — versions 4.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- ce714d77-add3-4f53-aff5-83d477b104bb (Vendor Advisory)
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Frequently asked questions
- What is CVE-2025-13465?
- CVE-2025-13465 is a medium-severity vulnerability in Lodash, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 5.3/10. Published 2026-01-21.
- How severe is CVE-2025-13465?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2025-13465 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.