What’s Vulnerable › Vulnerabilities

CVE-2021-4296: w3c Unicorn ValidatorNuMessage.java ValidatorNuMessage cross site scripting

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-12-29 · updated 2026-06-17
• Weakness: CWE-79

Description

A vulnerability, which was classified as problematic, has been found in w3c Unicorn. This issue affects the function ValidatorNuMessage of the file src/org/w3c/unicorn/response/impl/ValidatorNuMessage.java. The manipulation of the argument message leads to cross site scripting. The attack may be initiated remotely. The name of the patch is 51f75c31f7fc33859a9a571311c67ae4e95d9c68. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-217019.

Affected products

• w3c Unicorn: before 2021-06-03 — fixed in 2021-06-03

How to fix

Upgrade to a fixed version: w3c Unicorn 2021-06-03. Check the vendor advisory for mitigations.

References

• https://github.com/w3c/Unicorn/commit/51f75c31f7fc33859a9a571311c67ae4e95d9c68
• https://github.com/w3c/Unicorn/pull/212
• https://vuldb.com/?ctiid.217019
• https://vuldb.com/?id.217019
• https://github.com/w3c/Unicorn/commit/51f75c31f7fc33859a9a571311c67ae4e95d9c68
• https://github.com/w3c/Unicorn/pull/212
• https://vuldb.com/?ctiid.217019
• https://vuldb.com/?id.217019

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