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Vulnerability record · CVE-2025-4215 · published 2 May 2025

CVE-2025-4215: Ublockorigin ublock origin uncontrolled resource consumption vulnerability

Ublockorigin · Ublock Origin

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.

2.3 CVSS 4.0 Low EPSS 0.79% · top 45.4% CWE-400 · Uncontrolled resource consumptionCWE-1333 · Inefficient regular expression (ReDoS)
2.3CVSS 4.0 base score, v2 2.6
0.79%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
7References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

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:

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/gorhill/uBlock/commit/eaedaf5b10d2f7857c6b77fbf7d4a80681d4d46c ExploitPatch
https://github.com/gorhill/uBlock/releases/tag/1.63.3b17 Release Notes
https://vuldb.com/?ctiid.307194 Permissions RequiredVDB Entry
https://vuldb.com/?id.307194 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.562301 Third Party AdvisoryVDB Entry
https://lists.debian.org/debian-lts-announce/2025/06/msg00013.html Mailing List
https://github.com/gorhill/uBlock/commit/eaedaf5b10d2f7857c6b77fbf7d4a80681d4d46c ExploitPatch

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Source: NIST National Vulnerability Database (record CVE-2025-4215), CISA KEV, FIRST EPSS (scores of 2026-10-01). This page is refreshed as NVD updates the record.