What’s Vulnerable › Vulnerabilities

CVE-2021-23900

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-01-13 · updated 2026-06-17

Description

OWASP json-sanitizer before 1.2.2 can output invalid JSON or throw an undeclared exception for crafted input. This may lead to denial of service if the application is not prepared to handle these situations.

Affected products

• OWASP Json-Sanitizer: before 1.2.2 — fixed in 1.2.2

How to fix

Upgrade to a fixed version: OWASP Json-Sanitizer 1.2.2. Check the vendor advisory for mitigations.

References

• https://github.com/OWASP/json-sanitizer/commit/a37f594f7378a1c76b3283e0dab9e1ab1dc0247e
• https://github.com/OWASP/json-sanitizer/compare/v1.2.1...v1.2.2
• https://groups.google.com/g/json-sanitizer-support/c/dAW1AeNMoA0
• https://github.com/OWASP/json-sanitizer/commit/a37f594f7378a1c76b3283e0dab9e1ab1dc0247e
• https://github.com/OWASP/json-sanitizer/compare/v1.2.1...v1.2.2
• https://groups.google.com/g/json-sanitizer-support/c/dAW1AeNMoA0

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