Vulnerability · Published Dec 8, 2021 · Assigned by mozilla

CVE-2021-43530

Medium 6.1

In plain English

A medium-severity security flaw in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 73% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS NVD)6.1Medium

Exploit odds (30 days)1.4%top 27.1% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack tooling1Public PoC

Official description

A Universal XSS vulnerability was present in Firefox for Android resulting from improper sanitization when processing a URL scanned from a QR code. *This bug only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 94.

Affected products (as reported)

Vendor	Product	Versions
Mozilla	Firefox	unspecified – before 94

References

https://www.mozilla.org/security/advisories/mfsa2021-48/ x_refsource_MISC
https://bugzilla.mozilla.org/show_bug.cgi?id=1736886 x_refsource_MISC