Vulnerability identifier: #VU50882
Vulnerability risk: Medium
CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-79
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Mozilla Firefox
Client/Desktop applications /
Web browsers
Vendor: Mozilla
Description
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data. The DOMParser API did not properly process <noscript>
elements for escaping. A remote attacker can bypass HTML Sanitizer and perform XSS attacks.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Mozilla Firefox: 80.0 - 85.0.2
External links
http://www.mozilla.org/en-US/security/advisories/mfsa2021-07/
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.