Mozilla Firefox up to 143 Javascript Object sensitive data storage in improperly locked memory

CVSS Meta Temp Score
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CTI Interest Score
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3.0$5k-$25k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Mozilla Firefox up to 143. Affected by this issue is some unknown functionality of the component Javascript Object Handler. The manipulation leads to an unknown weakness. This vulnerability is documented as CVE-2025-11711. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Mozilla Firefox up to 143. This issue affects an unknown code of the component Javascript Object Handler. Using CWE to declare the problem leads to CWE-591. The product stores sensitive data in memory that is not locked, or that has been incorrectly locked, which might cause the memory to be written to swap files on disk by the virtual memory manager. This can make the data more accessible to external actors. Impacted is integrity. The summary by CVE is:

There was a way to change the value of JavaScript Object properties that were supposed to be non-writeable. This vulnerability affects Firefox < 144, Firefox ESR < 115.29, Firefox ESR < 140.4, Thunderbird < 144, and Thunderbird < 140.4.

The advisory is shared at bugzilla.mozilla.org. The identification of this vulnerability is CVE-2025-11711 since 10/13/2025. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful 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 $5k-$25k at the moment (estimation calculated on 11/16/2025).

The vulnerability scanner Nessus provides a plugin with the ID 270392 (Mozilla Firefox ESR < 115.29), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 144 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (270392) and CERT Bund (WID-SEC-2025-2275). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • IGEL OS
  • 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: 3.1
VulDB Meta Temp Score: 3.0

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Sensitive data storage in improperly locked memory
CWE: CWE-591 / CWE-200 / CWE-284
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: 270392
Nessus Name: Mozilla Firefox ESR < 115.29

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Firefox 144

Timelineinfo

10/13/2025 CVE reserved
10/14/2025 +1 days Advisory disclosed
10/14/2025 +0 days VulDB entry created
11/16/2025 +33 days VulDB entry last update

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: bugzilla.mozilla.org
Status: Confirmed

CVE: CVE-2025-11711 (🔒)
GCVE (CVE): GCVE-0-2025-11711
GCVE (VulDB): GCVE-100-328241
CERT Bund: WID-SEC-2025-2275 - Mozilla Firefox: Mehrere Schwachstellen

Entryinfo

Created: 10/14/2025 15:54
Updated: 11/16/2025 13:26
Changes: 10/14/2025 15:54 (54), 10/15/2025 17:55 (2), 10/17/2025 15:00 (1), 11/16/2025 13:26 (7)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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