Mozilla Thunderbird up to 128.6 Certificate Store certificate validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.9$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Mozilla Thunderbird up to 128.6. Affected is an unknown function of the component Certificate Store. The manipulation results in certificate validation. This vulnerability is reported as CVE-2025-1014. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Mozilla Thunderbird up to 128.6. It has been classified as critical. Affected is an unknown part of the component Certificate Store. The manipulation with an unknown input leads to a certificate validation vulnerability. CWE is classifying the issue as CWE-295. The product does not validate, or incorrectly validates, a certificate. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Certificate length was not properly checked when added to a certificate store. In practice only trusted data was processed. This vulnerability was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.

The advisory is shared for download at bugzilla.mozilla.org. This vulnerability is traded as CVE-2025-1014 since 02/04/2025. The exploitability is told to be easy. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 04/15/2026). The MITRE ATT&CK project declares the attack technique as T1587.003.

The vulnerability scanner Nessus provides a plugin with the ID 215021 (Debian dsa-5858 : firefox-esr - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 128.7 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (215021). Once again VulDB remains the best source for vulnerability data.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.9

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

NVD Base Score: 8.8
NVD Vector: 🔍

ADP CISA Base Score: 8.8
ADP CISA Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Certificate validation
CWE: CWE-295 / CWE-287
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: 215021
Nessus Name: Debian dsa-5858 : firefox-esr - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Thunderbird 128.7

Timelineinfo

02/04/2025 🔍
02/04/2025 +0 days 🔍
02/04/2025 +0 days 🔍
04/15/2026 +435 days 🔍

Sourcesinfo

Vendor: mozilla.org

Advisory: bugzilla.mozilla.org
Status: Confirmed

CVE: CVE-2025-1014 (🔍)
GCVE (CVE): GCVE-0-2025-1014
GCVE (VulDB): GCVE-100-294612

Entryinfo

Created: 02/04/2025 15:35
Updated: 04/15/2026 08:30
Changes: 02/04/2025 15:35 (22), 02/04/2025 15:38 (34), 02/06/2025 00:03 (2), 02/07/2025 10:18 (12), 04/15/2026 08:30 (12)
Complete: 🔍
Committer: mitr
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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