CVE-2021-4296

6.1 mediumEPSS 0.6%

Medium (6.1) in w3 unicorn. EPSS 0.6% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

6.1 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 46% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2022-12-29
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

w3:unicorn

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

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