Mozilla Thunderbird up to 140 CSP Report debug log file

CVSS Meta Temp Score
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CTI Interest Score
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3.0$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Mozilla Thunderbird up to 140. This affects an unknown part of the component CSP Report Handler. The manipulation leads to debug log file. This vulnerability is listed as CVE-2025-8031. The attack may be initiated remotely. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mozilla Thunderbird up to 140 and classified as problematic. This issue affects an unknown code of the component CSP Report Handler. The manipulation with an unknown input leads to a debug log file vulnerability. Using CWE to declare the problem leads to CWE-534. This entry has been deprecated because its abstraction was too low-level. See CWE-532. Impacted is confidentiality. The summary by CVE is:

The `username:password` part was not correctly stripped from URLs in CSP reports potentially leaking HTTP Basic Authentication credentials. This vulnerability affects Firefox < 141, Firefox ESR < 128.13, Firefox ESR < 140.1, Thunderbird < 141, Thunderbird < 128.13, and Thunderbird < 140.1.

It is possible to read the advisory at bugzilla.mozilla.org. The identification of this vulnerability is CVE-2025-8031 since 07/22/2025. 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. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/08/2025). The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 242648 (Debian dsa-5964 : firefox-esr - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 141 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (242648) and CERT Bund (WID-SEC-2025-1623). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Fedora Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • 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: Debug log file
CWE: CWE-534 / CWE-532 / CWE-200
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
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Nessus ID: 242648
Nessus Name: Debian dsa-5964 : firefox-esr - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Thunderbird 141

Timelineinfo

07/22/2025 CVE reserved
07/23/2025 +1 days Advisory disclosed
07/23/2025 +0 days VulDB entry created
08/08/2025 +16 days VulDB entry last update

Sourcesinfo

Vendor: mozilla.org

Advisory: bugzilla.mozilla.org
Status: Confirmed

CVE: CVE-2025-8031 (🔒)
GCVE (CVE): GCVE-0-2025-8031
GCVE (VulDB): GCVE-100-317363
CERT Bund: WID-SEC-2025-1623 - Mozilla Firefox , Firefox ESR und Thunderbird: Mehrere Schwachstellen

Entryinfo

Created: 07/23/2025 08:34
Updated: 08/08/2025 19:38
Changes: 07/23/2025 08:34 (56), 07/23/2025 17:06 (1), 07/24/2025 20:34 (2), 07/27/2025 19:16 (7), 07/31/2025 21:54 (1), 08/08/2025 19:38 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

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