XSS in W3 Unicorn
CVE-2021-4296
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.005 (41.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, permissions-required, Third Party Advisory)
- github.com/w3c/Unicorn/pull/212 (issue-tracking, Third Party Advisory)
- github.com/w3c/Unicorn/commit/51f75c31f7fc33859a9a571311c67ae4e95d9c68 (Patch, Third Party Advisory, patch)
Frequently asked questions
- What is CVE-2021-4296?
- CVE-2021-4296 is a low-severity vulnerability in W3 Unicorn, classified under Cross-site Scripting. CVSS score: 3.5/10. Published 2022-12-29.
- How severe is CVE-2021-4296?
- Low severity. CVSS v3 base score is 3.5 out of 10.