CVE-2021-23974
published 2021-02-26CVE-2021-23974: The DOMParser API did not properly process '' elements for escaping. This could be used as an mXSS vector to bypass an HTML Sanitizer. This vulnerability…
PriorityP425medium6.1CVSS 3.1
AVNACLPRNUIRSCCLILAN
EPSS
0.75%
50.5th percentile
The DOMParser API did not properly process '' elements for escaping. This could be used as an mXSS vector to bypass an HTML Sanitizer. This vulnerability affects Firefox < 86.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 86.0-1 (sid) | firefox 86.0-1 (sid) |
| mozilla | firefox | < 86 | 86 |
| mozilla | firefox | < 86.0 | 86.0 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= 0 < 86.0+build3-0ubuntu0.16.04.1 | 86.0+build3-0ubuntu0.16.04.1 |
| mozilla | firefox | >= 0 < 86.0+build3-0ubuntu0.18.04.1 | 86.0+build3-0ubuntu0.18.04.1 |
| mozilla | firefox | >= 0 < 86.0+build3-0ubuntu0.20.04.1 | 86.0+build3-0ubuntu0.20.04.1 |
CVSS provenance
nvdv3.16.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
nvdv2.04.3MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N
osv6.1MEDIUM
vendor_debian6.1MEDIUM
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Ubuntu
Firefox vulnerabilities
vendor_ubuntu·2021-02-26
CVE-2021-23971 Firefox vulnerabilities
Title: Firefox vulnerabilities
Summary: Firefox could be made to crash or run programs as your login if it
opened a malicious website.
Multiple security issues were discovered in Firefox. If a user were
tricked into opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, obtain sensitive
information, conduct cross-site scripting (XSS) attacks, bypass HTTP auth
phishing warnings, or execute arbitrary code.
Instructions: After a standard system update you need to restart Firefox to make
all the necessary changes.
Debian
CVE-2021-23974: firefox - The DOMParser API did not properly process '<noscript>' elements for escaping. T...
vendor_debian·2021·CVSS 6.1
CVE-2021-23974 [MEDIUM] CVE-2021-23974: firefox - The DOMParser API did not properly process '<noscript>' elements for escaping. T...
The DOMParser API did not properly process '' elements for escaping. This could be used as an mXSS vector to bypass an HTML Sanitizer. This vulnerability affects Firefox < 86.
Scope: local
sid: resolved (fixed in 86.0-1)
Mozilla
Mozilla Foundation Security Advisory 2021-07: CVE-2021-23974
vendor_mozilla·CVSS 6.1
CVE-2021-23974 [MEDIUM] Mozilla Foundation Security Advisory 2021-07: CVE-2021-23974
Mozilla Foundation Security Advisory 2021-07
CVE: CVE-2021-23974
Product: Firefox
Impact: high
Fixed in: Firefox 86
GHSA
GHSA-xgvx-m8xh-737m: The DOMParser API did not properly process '' elements for escaping
ghsa_unreviewed·2022-05-24
CVE-2021-23974 [MEDIUM] GHSA-xgvx-m8xh-737m: The DOMParser API did not properly process '' elements for escaping
The DOMParser API did not properly process '' elements for escaping. This could be used as an mXSS vector to bypass an HTML Sanitizer. This vulnerability affects Firefox < 86.
OSV
CVE-2021-23974: The DOMParser API did not properly process '' elements for escaping
osv·2021-02-26·CVSS 6.1
CVE-2021-23974 [MEDIUM] CVE-2021-23974: The DOMParser API did not properly process '' elements for escaping
The DOMParser API did not properly process '' elements for escaping. This could be used as an mXSS vector to bypass an HTML Sanitizer. This vulnerability affects Firefox < 86.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1528997%2C1683627https://security.gentoo.org/glsa/202104-10https://www.mozilla.org/security/advisories/mfsa2021-07/https://bugzilla.mozilla.org/buglist.cgi?bug_id=1528997%2C1683627https://security.gentoo.org/glsa/202104-10https://www.mozilla.org/security/advisories/mfsa2021-07/
2021-02-26
Published