CVE-2013-0757

critical

Published 2013-01-13 · Modified 2026-04-29

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

10.0

Description

The Chrome Object Wrapper (COW) implementation in Mozilla Firefox before 18.0, Firefox ESR 17.x before 17.0.2, Thunderbird before 17.0.2, Thunderbird ESR 17.x before 17.0.2, and SeaMonkey before 2.15 does not prevent modifications to the prototype of an object, which allows remote attackers to execute arbitrary JavaScript code with chrome privileges by referencing Object.prototype.__proto__ in a crafted HTML document.

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.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Metasploit modules

exploit_multi/browser/firefox_svg_plugin rank 600

Firefox 17.0.1 Flash Privileged Code Injection

Source code queued for fetch — refresh in a moment.

OS impact

OS	Version	Status
ubuntu	10.04	affected
ubuntu	11.10	affected
ubuntu	12.04	affected
ubuntu	12.10	affected
suse	11.4	affected
suse	12.1	affected
suse	12.2	affected
suse	10	affected
suse	11	affected

Application impact

Vendor	Product	Versions	Fixed
mozilla	firefox	`{"endExcluding":"17.0.2"}`	`17.0.2`
mozilla	seamonkey	`{"endExcluding":"2.15"}`	`2.15`
mozilla	thunderbird	`{"endExcluding":"17.0.2"}`	`17.0.2`
mozilla	thunderbird_esr	`{"endExcluding":"17.0.2"}`	`17.0.2`

References

CWEs

CWE-20

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

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