CVE-2015-4495: Mozilla Firefox Security Feature Bypass Vulnerability
CVE-2015-4495 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2022-05-25
The PDF reader in Mozilla Firefox allows remote attackers to bypass the Same Origin Policy (SOP) via crafted JavaScript code and a native setter. This vulnerability enables attackers to read arbitrary local files or gain elevated privileges, and was notably exploited in the wild to target sensitive user data.
Yes. CVE-2015-4495 is known to be exploited in the wild, first recorded on 25 May 2022. Treat it as urgent.
How severe is CVE-2015-4495?
Critical severity, with a CVSS score of 8.8, published 25 May 2022.
Which products and versions are affected?
Mozilla Firefox before 39.0.3; Mozilla Firefox ESR 38.x before 38.1.1; Mozilla Firefox OS before 2.2.
Is there a fix for CVE-2015-4495?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2015-4495 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2015-4495?
Check whether you run Mozilla Firefox, Mozilla Firefox ESR or Mozilla Thunderbird. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Affected products
Mozilla Firefox before 39.0.3
Mozilla Firefox ESR 38.x before 38.1.1
Mozilla Firefox OS before 2.2
Timeline
2015-08-06: disclosed: Exploit found in the wild reported by Mozilla blog
2015-08-01: exploited: Exploited in the wild in August 2015
2022-05-25: kev added: Added to CISA Known Exploited Vulnerabilities Catalog