Medium severity4.3NVD Advisory· Published Jun 24, 2021· Updated Jun 17, 2026

CVE-2021-29958

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Mozilla Corporation/Firefox for iOSllm-fuzzy2 versions
<34+ 1 more
- (no CPE)range: <34
- (no CPE)range: unspecified
Mozilla Corporation/Firefox
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:iphone_os:*:*
Range: <34.0

Patches

Vulnerability mechanics

References

bugzilla.mozilla.org/show_bug.cginvdPermissions RequiredVendor Advisory
www.mozilla.org/security/advisories/mfsa2021-25/nvdRelease NotesVendor Advisory

News mentions

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cvss	0.280
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000