Mailu up to 1.6 fetchmail Script authorization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.9$0-$5k0.00

Summaryinfo

A vulnerability has been found in Mailu up to 1.6 and classified as critical. This affects an unknown part of the component fetchmail Script. This manipulation causes authorization. This vulnerability is tracked as CVE-2020-5239. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in Mailu up to 1.6 and classified as critical. Affected by this vulnerability is an unknown part of the component fetchmail Script. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-863. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In Mailu before version 1.7, an authenticated user can exploit a vulnerability in Mailu fetchmail script and gain full access to a Mailu instance. Mailu servers that have open registration or untrusted users are most impacted. The master and 1.7 branches are patched on our git repository. All Docker images published on docker.io/mailu for tags 1.5, 1.6, 1.7 and master are patched. For detailed instructions about patching and securing the server afterwards, see https://github.com/Mailu/Mailu/issues/1354

The weakness was disclosed 02/13/2020 (GitHub Repository). The advisory is shared at github.com. This vulnerability is known as CVE-2020-5239 since 01/02/2020. The attack can be launched remotely. A single authentication is necessary for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

Upgrading to version 1.7 eliminates this vulnerability.

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Productinfo

Name

Version

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: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.7
NVD Vector: 🔍

CNA Base Score: 8.7
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Authorization
CWE: CWE-863 / CWE-285 / CWE-266
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Mailu 1.7

Timelineinfo

01/02/2020 🔍
02/13/2020 +42 days 🔍
02/13/2020 +0 days 🔍
05/11/2025 +1914 days 🔍

Sourcesinfo

Product: github.com

Advisory: 1354
Status: Confirmed

CVE: CVE-2020-5239 (🔍)
GCVE (CVE): GCVE-0-2020-5239
GCVE (VulDB): GCVE-100-150097

Entryinfo

Created: 02/13/2020 18:41
Updated: 05/11/2025 13:24
Changes: 02/13/2020 18:41 (38), 02/13/2020 18:46 (11), 03/30/2024 18:45 (17), 03/30/2024 18:51 (19), 05/11/2025 13:24 (7)
Complete: 🔍
Cache ID: 216::103

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