Mozilla Thunderbird 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 described as problematic has been identified in Mozilla Thunderbird up to 143. This affects an unknown part of the component Javascript Object Handler. The manipulation results in an unknown weakness. This vulnerability is reported as CVE-2025-11711. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Mozilla Thunderbird up to 143. Affected is an unknown code block of the component Javascript Object Handler. CWE is classifying the issue as 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. This is going to have an impact on integrity. CVE summarizes:

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 available at bugzilla.mozilla.org. This vulnerability is traded as CVE-2025-11711 since 10/13/2025. 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. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of 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). If you want to get best quality of vulnerability data, you may have to visit VulDB.

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
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💳💳💳💳💳💳
💳💳💳💳💳💳
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: Thunderbird 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

Advisory: bugzilla.mozilla.org
Status: Confirmed

CVE: CVE-2025-11711 (🔒)
GCVE (CVE): GCVE-0-2025-11711
GCVE (VulDB): GCVE-100-328242
CERT Bund: WID-SEC-2025-2275 - Mozilla Firefox: Mehrere Schwachstellen

Entryinfo

Created: 10/14/2025 15:54
Updated: 11/16/2025 13:27
Changes: 10/14/2025 15:54 (54), 10/15/2025 17:55 (2), 10/17/2025 15:00 (1), 11/16/2025 13:27 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

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