CVE-2015-2741

medium

Published 2015-07-06 · Modified 2026-05-06

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

4.3

Description

Mozilla Firefox before 39.0, Firefox ESR 38.x before 38.1, and Thunderbird before 38.1 do not enforce key pinning upon encountering an X.509 certificate problem that generates a user dialog, which allows user-assisted man-in-the-middle attackers to bypass intended access restrictions by triggering a (1) expired certificate or (2) mismatched hostname for a domain with pinning enabled.

Predictions

Exploit likelihood

20%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Application impact

Vendor	Product	Versions
mozilla	firefox	`{"endIncluding":"38.1.0"}`
mozilla	firefox	`31.0`
mozilla	firefox	`31.1.0`
mozilla	firefox	`31.1.1`
mozilla	firefox	`31.3.0`
mozilla	firefox	`31.5.1`
mozilla	firefox	`31.5.2`
mozilla	firefox	`31.5.3`
mozilla	firefox	`38.0`
mozilla	firefox_esr	`31.1`
mozilla	firefox_esr	`31.2`
mozilla	firefox_esr	`31.3`
mozilla	firefox_esr	`31.4`
mozilla	firefox_esr	`31.5`
mozilla	firefox_esr	`31.6.0`
mozilla	firefox_esr	`31.7.0`

References

CWEs

CWE-310

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.