What’s Vulnerable › Vulnerabilities

CVE-2020-36255

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-03-05 · updated 2026-06-17

Description

An issue was discovered in IdentityModel (aka ScottBrady.IdentityModel) before 1.3.0. The Branca implementation allows an attacker to modify and forge authentication tokens.

Affected products

• Identitymodel Project Identitymodel: before 1.3.0 — fixed in 1.3.0

How to fix

Upgrade to a fixed version: Identitymodel Project Identitymodel 1.3.0. Check the vendor advisory for mitigations.

References

• https://github.com/scottbrady91/IdentityModel/compare/1.2.0...1.3.0
• https://github.com/scottbrady91/IdentityModel/issues/3
• https://github.com/scottbrady91/IdentityModel/issues/4
• https://github.com/scottbrady91/IdentityModel/compare/1.2.0...1.3.0
• https://github.com/scottbrady91/IdentityModel/issues/3
• https://github.com/scottbrady91/IdentityModel/issues/4

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