CVE-2025-8032 XSLT documents could bypass CSP
Attackers can bypass Content Security Policy restrictions by exploiting improper source document propagation in XSLT loading within Firefox and Thunderbird.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-8032?
CVE-2025-8032 is a high-severity vulnerability in Mozilla Firefox, published on 22 Jul 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
XSLT document loading did not correctly propagate the source document which bypassed its CSP. This vulnerability was fixed in Firefox 141, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.
Weakness: CWE-693
Which versions are affected by CVE-2025-8032?
It affects 2 products.
Products include Mozilla Firefox, Mozilla Thunderbird.
How do I fix CVE-2025-8032?
Upgrade to a fixed version.
Is CVE-2025-8032 being exploited?
There is no known exploitation of CVE-2025-8032 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as DEBIAN-CVE-2025-8032, GHSA-hxr8-chw2-2wqc, UBUNTU-CVE-2025-8032.