Mattermost up to 10.5.9/10.9.4/10.10.1 Link redirect_to

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Mattermost up to 10.5.9/10.9.4/10.10.1. This vulnerability affects unknown code of the component Link Handler. The manipulation of the argument redirect_to results in redirect. This vulnerability was named CVE-2025-9072. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mattermost up to 10.5.9/10.9.4/10.10.1. It has been classified as problematic. Affected is an unknown functionality of the component Link Handler. The manipulation of the argument redirect_to with an unknown input leads to a redirect vulnerability. CWE is classifying the issue as CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. This is going to have an impact on integrity. CVE summarizes:

Mattermost versions 10.10.x <= 10.10.1, 10.5.x <= 10.5.9, 10.9.x <= 10.9.4 fail to validate the redirect_to parameter, allowing an attacker to craft a malicious link that, once a user authenticates with their SAML provider, could post the user’s cookies to an attacker-controlled URL.

The weakness was presented by DoyenSec. The advisory is available at mattermost.com. This vulnerability is traded as CVE-2025-9072 since 08/15/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1204.001 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 266220 (Mattermost Server 10.5.x < 10.5.10 / 10.9.x < 10.9.5 / 10.10.x < 10.10.2 / 10.11.0 URL Redirection (MMSA-2025-00509)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 10.5.10, 10.9.5, 10.10.2 or 10.11.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (266220) and EUVD (EUVD-2025-29171). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.5

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.4
NVD Vector: 🔒

CNA Base Score: 7.6
CNA Vector (Mattermost): 🔒

CVSSv2info

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

Exploitinginfo

Class: Redirect
CWE: CWE-601
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: 266220
Nessus Name: Mattermost Server 10.5.x < 10.5.10 / 10.9.x < 10.9.5 / 10.10.x < 10.10.2 / 10.11.0 URL Redirection (MMSA-2025-00509)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Mattermost 10.5.10/10.9.5/10.10.2/10.11.0

Timelineinfo

08/15/2025 CVE reserved
09/15/2025 +31 days Advisory disclosed
09/15/2025 +0 days VulDB entry created
10/02/2025 +17 days VulDB entry last update

Sourcesinfo

Advisory: mattermost.com
Researcher: DoyenSec
Status: Confirmed

CVE: CVE-2025-9072 (🔒)
GCVE (CVE): GCVE-0-2025-9072
GCVE (VulDB): GCVE-100-323898
EUVD: 🔒

Entryinfo

Created: 09/15/2025 14:49
Updated: 10/02/2025 19:34
Changes: 09/15/2025 14:49 (66), 09/16/2025 22:36 (1), 09/17/2025 00:53 (9), 10/02/2025 19:34 (2)
Complete: 🔍
Cache ID: 216::103

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

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