CVE-2021-23974
Medium
Published: 26 February 2021
Published
26 February 2021
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1
6.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS Score
0.0026
49.2th percentile
Risk Priority
12
60% EPSS · 20% KEV · 20% CVSS
Summary
CVE-2021-23974 is a medium-severity an unspecified weakness vulnerability in Mozilla Firefox. Its CVSS base score is 6.1 (Medium).
Operationally, ranked at the 49.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-10895
Vulnerability details
The DOMParser API did not properly process '<noscript>' elements for escaping. This could be used as an mXSS vector to bypass an HTML Sanitizer. This vulnerability affects Firefox < 86.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
mozilla
firefox
≤ 86.0
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.