Vulnerability · Published Feb 26, 2021 · Assigned by mozilla
CVE-2021-23957
High 7.4
In plain English
A high-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 0.8% (higher than 57% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.4High
Exploit odds (30 days)0.8%top 43.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
Navigations through the Android-specific `intent` URL scheme could have been misused to escape iframe sandbox. Note: This issue only affected Firefox for Android. Other operating systems are unaffected. This vulnerability affects Firefox < 85.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox | 85.0-r0 | ALPINE-CVE-2021-23957 |
| Alpine:v3.21 | firefox | 85.0-r0 | ALPINE-CVE-2021-23957 |
| Alpine:v3.22 | firefox | 85.0-r0 | ALPINE-CVE-2021-23957 |
| Alpine:v3.23 | firefox | 85.0-r0 | ALPINE-CVE-2021-23957 |
| Alpine:v3.21 | librewolf | 85.0-r0 | ALPINE-CVE-2021-23957 |
| Alpine:v3.22 | librewolf | 85.0-r0 | ALPINE-CVE-2021-23957 |
| Alpine:v3.23 | librewolf | 85.0-r0 | ALPINE-CVE-2021-23957 |
| Alpine:v3.24 | librewolf | 85.0-r0 | ALPINE-CVE-2021-23957 |
Affected products (as reported)
References
- https://www.mozilla.org/security/advisories/mfsa2021-03/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1584582 x_refsource_MISC