VDB-307194 · Submit #562301 · CVE-2025-4215

gorhill uBlock Origin up to 1.63.3b16 UI src/js/1p-filters.js currentStateChanged redos

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
2.9	$0-$5k	0.00

Summaryinfo

A vulnerability was found in gorhill uBlock Origin up to 1.63.3b16. It has been declared as problematic. This affects the function currentStateChanged of the file src/js/1p-filters.js of the component UI. The manipulation results in redos. This vulnerability is cataloged as CVE-2025-4215. The attack may be launched remotely. Furthermore, there is an exploit available. It is recommended to upgrade the affected component.

Detailsinfo

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 with an unknown input leads to a redos vulnerability. CWE is classifying the issue as CWE-1333. The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. This is going to have an impact on availability.

The advisory is available at github.com. This vulnerability is traded as CVE-2025-4215. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details and a public exploit are known. This vulnerability is assigned to T1449.003 by the MITRE ATT&CK project.

The exploit is shared for download at github.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 237406 (Fedora 41 : mozilla-ublock-origin (2025-b0f2570b61)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.63.3b17 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch eaedaf5b10d2f7857c6b77fbf7d4a80681d4d46c is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (237406) and EUVD (EUVD-2025-13306). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

gorhill

Name

uBlock Origin

Version

1.63.3b16

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔍
CNA CVSS-BT Score: 🔍
CNA Vector: 🔍

CVSSv3info

VulDB Meta Base Score: 3.1
VulDB Meta Temp Score: 2.9

VulDB Base Score: 3.1
VulDB Temp Score: 2.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 3.1
CNA Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Redos
CWE: CWE-1333 / CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 237406
Nessus Name: Fedora 41 : mozilla-ublock-origin (2025-b0f2570b61)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: uBlock Origin 1.63.3b17
Patch: eaedaf5b10d2f7857c6b77fbf7d4a80681d4d46c

Timelineinfo

05/02/2025 🔍
05/02/2025 +0 days 🔍
06/12/2025 +41 days 🔍

Sourcesinfo

Advisory: eaedaf5b10d2f7857c6b77fbf7d4a80681d4d46c
Status: Confirmed

CVE: CVE-2025-4215 (🔍)
GCVE (CVE): GCVE-0-2025-4215
GCVE (VulDB): GCVE-100-307194
EUVD: 🔍
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 05/02/2025 14:58
Updated: 06/12/2025 03:34
Changes: 05/02/2025 14:58 (62), 05/03/2025 10:11 (30), 05/28/2025 13:59 (2), 06/12/2025 03:12 (1), 06/12/2025 03:34 (1)
Complete: 🔍
Submitter: DayShift
Cache ID: 216::103

Submitinfo

Accepted

Submit #562301: uBlock @gorhill/ubo-core >=npm_0.1.11 Inefficient Regular Expression Complexity (by DayShift)

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