Vulnerability · Published Jun 24, 2021 · Assigned by mozilla
CVE-2021-29958
Medium 4.3
In plain English
A medium-severity security flaw in Firefox for iOS from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities).
Severity (CVSS NVD)4.3Medium
Exploit odds (30 days)0.7%top 47.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
When a download was initiated, the client did not check whether it was in normal or private browsing mode, which led to private mode cookies being shared in normal browsing mode. This vulnerability affects Firefox for iOS < 34.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox for iOS | unspecified – before 34 |
References
- https://www.mozilla.org/security/advisories/mfsa2021-25/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1670127 x_refsource_MISC