VIR Vulnerability Intelligence Relay

CVE-2015-2733

critical
Published 2015-07-06 · Modified 2026-05-06
CVSS v3
—
CVSS v2
10.0
VIR risk
10.0

Description

Use-after-free vulnerability in the CanonicalizeXPCOMParticipant function in Mozilla Firefox before 39.0 and Firefox ESR 31.x before 31.8 and 38.x before 38.1 allows remote attackers to execute arbitrary code via vectors involving attachment of an XMLHttpRequest object to a dedicated worker.

Predictions

Exploit likelihood
20%
Patch ETA
—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: security@mozilla.org — http://www.mozilla.org/security/announce/2015/mfsa2015-65.html

OS impact
OSVersionStatusFixed in
suse suse12.0affected

Application impact
VendorProductVersionsFixed
mozillafirefox{"endIncluding":"38.1.0"}
mozillafirefox31.0
mozillafirefox31.1.0
mozillafirefox31.1.1
mozillafirefox31.3.0
mozillafirefox31.5.1
mozillafirefox31.5.2
mozillafirefox31.5.3
mozillafirefox38.0
mozillafirefox_esr31.1
mozillafirefox_esr31.2
mozillafirefox_esr31.3
mozillafirefox_esr31.4
mozillafirefox_esr31.5
mozillafirefox_esr31.6.0
mozillafirefox_esr31.7.0

References

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