CVE-2016-5265

What it is

Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 allow user-assisted remote attackers to bypass the Same Origin Policy, and conduct Universal XSS (UXSS) attacks or read arbitrary files, by arranging for the presence of a crafted HTML document and a crafted shortcut file in the same local directory.

At a glance

Exploitability

Can be exploited locally on the machine without logging in, but needs a user to act. High risk of data exposure.

Exploit odds

1.2% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2016-08-05 01:59 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 00:49 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.2% in the next 30 days (EPSS).
• Severity: 5.5 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2016-08-05 01:59 UTC

Last modified

2026-06-17 00:49 UTC

Exploit probability

1.2% · EPSS, next 30 days

Weakness

CWE-79 · Cross-site scripting

Record status

Modified

Affected

• Oracle Linux 5.0
• Oracle Linux 6
• Oracle Linux 7
• Mozilla Firefox ≤ 47.0.1
• Mozilla Firefox 45.1.0
• Mozilla Firefox 45.1.1
• Mozilla Firefox 45.2.0
• Mozilla Firefox 45.3.0

Attack profile CVSS 3.0 · 5.5

Attack vector

Local

Complexity

High

Privileges needed

None

User interaction

Required

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2016-5265.md and follow it. Check whether this project is affected by CVE-2016-5265. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

Copy as ticket · More options · Status badge