CVE-2025-9180

What it is

Same-origin policy bypass in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 142, Firefox ESR 115.27, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.

At a glance

Exploitability

Can be exploited over the network without logging in, but needs a user to act. High risk of data exposure, data tampering.

Exploit odds

0.3% chance of exploitation in the next 30 days (EPSS).

Fix

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

Timeline

1. 2025-08-19 21:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-10-05 15:10 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.3% in the next 30 days (EPSS).
• Severity: 8.1 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2025-08-19 21:15 UTC

Last modified

2026-10-05 15:10 UTC

Exploit probability

0.3% · EPSS, next 30 days

Weakness

CWE-346

Record status

Modified

Affected

• Mozilla Firefox < 115.27.0
• Mozilla Firefox < 142.0
• Mozilla Firefox < 128.14.0
• Mozilla Firefox < 140.2.0
• Mozilla Thunderbird < 128.14.0
• Mozilla Thunderbird < 142.0
• Mozilla Thunderbird < 140.2.0

Attack profile CVSS 3.1 · 8.1

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

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-2025-9180.md and follow it. Check whether this project is affected by CVE-2025-9180. 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