CVE-2025-19367.3HighCWE-158

CVE-2025-1936: Adding %00 and a fake extension to a jar: URL changed the interpretation of the contents

Mozilla · Firefox

Vendor fix available · Affected: Mozilla Firefox · Exploitation: unlikely (under 1%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

0.5%probability of exploitation in the next 30 days

39th percentile

050100

Higher than 39% of scored CVEs

7.3HighCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

jar: URLs retrieve local file content packaged in a ZIP archive. The null and everything after it was ignored when retrieving the content from the archive, but the fake extension after the null was used to determine the type of content. This could have been used to hide code in a web extension disguised as something else like an image. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

Affected products2

From the CVE record. A product or version that is not listed is unknown, not unaffected.

Mozilla · FirefoxVersions not stated
Mozilla · ThunderbirdVersions not stated

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Unlikely (under 1%). EPSS under 1%, or no score yet.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Improper Neutralization of Null Byte or NUL Character · Injection and Smuggling
Vendor: Mozilla
Published: March 2025
Band: Unlikely (under 1%), March 2025

CoverageNo articles yet

No CyberSIXT article names CVE-2025-1936 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.