What’s Vulnerable › Vulnerabilities

CVE-2021-3666: Prototype Pollution in fiznool/body-parser-xml

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-09-13 · updated 2026-06-17
• Weakness: CWE-1321

Description

body-parser-xml is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Affected products

• fiznool/body-parser-xml: before 2.0.3 — fixed in 2.0.3

How to fix

Upgrade to a fixed version: fiznool/body-parser-xml 2.0.3. Check the vendor advisory for mitigations.

References

• https://github.com/fiznool/body-parser-xml/commit/d46ca622560f7c9a033cd9321c61e92558150d63
• https://huntr.dev/bounties/1-other-fiznool/body-parser-xml
• https://github.com/fiznool/body-parser-xml/commit/d46ca622560f7c9a033cd9321c61e92558150d63
• https://huntr.dev/bounties/1-other-fiznool/body-parser-xml

Get alerted when CVE-2021-3666 or the next vulnerability affects your stack