CVE-2025-4215

Name: CVE-2025-4215
Creator: NVD / NIST
Published: 2025-05-02T21:15:23.893+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2.3/10EPSS 0.55%

Last modified Jun 17, 2026

CVE-2025-4215 is a low-severity vulnerability rated 2.3/10 on the CVSS scale. A vulnerability was found in gorhill uBlock Origin up to 1.63.3b16. It has been classified as problematic. EPSS estimates a 0.55% chance of exploitation in the next 30 days.

Description

A vulnerability was found in gorhill uBlock Origin up to 1.63.3b16. It has been classified as problematic. Affected is the function currentStateChanged of the file src/js/1p-filters.js of the component UI. The manipulation leads to inefficient regular expression complexity. It is possible to launch the attack remotely. The complexity of an attack is rather high. The exploitability is told to be difficult. The exploit has been disclosed to the public and may be used. Upgrading to version 1.63.3b17 is able to address this issue. The patch is identified as eaedaf5b10d2f7857c6b77fbf7d4a80681d4d46c. It is recommended to upgrade the affected component.

Metrics

CVSS 3.1

3.7/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS 4.0

2.3/10

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.55%

41.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Ublockorigin	Ublock Origin	< 1.63.3	—
Ublockorigin	Ublock Origin	1.63.3	Beta1
Debian	Debian Linux	11.0	—

References

https://github.com/gorhill/uBlock/commit/eaedaf5b10d2f7857c6b77fbf7d4a80681d4d46cExploit, Patch
https://github.com/gorhill/uBlock/releases/tag/1.63.3b17Release Notes
https://vuldb.com/?ctiid.307194Permissions Required, VDB Entry
https://vuldb.com/?id.307194Third Party Advisory, VDB Entry
https://vuldb.com/?submit.562301Third Party Advisory, VDB Entry
https://lists.debian.org/debian-lts-announce/2025/06/msg00013.htmlMailing List
https://github.com/gorhill/uBlock/commit/eaedaf5b10d2f7857c6b77fbf7d4a80681d4d46cExploit, Patch

Timeline

Published: May 2, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-4215?

How severe is CVE-2025-4215?

CVE-2025-4215 has a CVSS score of 2.3/10 (LOW severity). The EPSS model estimates a 0.55% probability of exploitation in the next 30 days.

How do I fix CVE-2025-4215?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-4215?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST