Mozilla Firefox up to 141 JavaScript Engine uninitialized pointer

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability was found in Mozilla Firefox up to 141. It has been classified as critical. Affected by this vulnerability is an unknown functionality of the component JavaScript Engine. Performing a manipulation results in uninitialized pointer. This vulnerability is identified as CVE-2025-9181. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in Mozilla Firefox up to 141. This affects an unknown code block of the component JavaScript Engine. The manipulation with an unknown input leads to a uninitialized pointer vulnerability. CWE is classifying the issue as CWE-824. The product accesses or uses a pointer that has not been initialized. The impact remains unknown. The summary by CVE is:

Uninitialized memory in the JavaScript Engine component. This vulnerability affects Firefox < 142, Firefox ESR < 128.14, Firefox ESR < 140.2, Thunderbird < 142, Thunderbird < 128.14, and Thunderbird < 140.2.

The advisory is shared at bugzilla.mozilla.org. This vulnerability is uniquely identified as CVE-2025-9181 since 08/19/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/12/2025).

The vulnerability scanner Nessus provides a plugin with the ID 253512 (Debian dla-4277 : firefox-esr - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 142 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (253512) and CERT Bund (WID-SEC-2025-1866). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • SUSE Linux
  • Oracle Linux
  • IGEL OS
  • SUSE openSUSE
  • RESF Rocky Linux
  • Mozilla Firefox
  • Mozilla Firefox ESR
  • Mozilla Thunderbird

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Uninitialized pointer
CWE: CWE-824 / CWE-908
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 253512
Nessus Name: Debian dla-4277 : firefox-esr - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Firefox 142

Timelineinfo

08/19/2025 Advisory disclosed
08/19/2025 +0 days CVE reserved
08/19/2025 +0 days VulDB entry created
10/12/2025 +54 days VulDB entry last update

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: bugzilla.mozilla.org
Status: Confirmed

CVE: CVE-2025-9181 (🔒)
GCVE (CVE): GCVE-0-2025-9181
GCVE (VulDB): GCVE-100-320661
CERT Bund: WID-SEC-2025-1866 - Mozilla Firefox und Thunderbird: Mehrere Schwachstellen

Entryinfo

Created: 08/19/2025 23:28
Updated: 10/12/2025 05:34
Changes: 08/19/2025 23:28 (55), 08/20/2025 10:45 (1), 08/21/2025 23:09 (2), 08/28/2025 02:16 (7), 09/07/2025 07:16 (1), 10/12/2025 05:34 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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