CVE-2023-1777

Information disclosure in linked message previews

Severity Score

5.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

Mattermost allows an attacker to request a preview of an existing message when creating a new message via the createPost API call, disclosing the contents of the linked message.

*Credits: Juho Nurminen

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2023-03-31 CVE Reserved
2023-03-31 CVE Published
2024-12-06 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
CWE-668: Exposure of Resource to Wrong Sphere

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://mattermost.com/security-updates	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Mattermost Search vendor "Mattermost"		Mattermost Server Search vendor "Mattermost" for product "Mattermost Server"				< 7.1.6 Search vendor "Mattermost" for product "Mattermost Server" and version " < 7.1.6"		-		Affected
Mattermost Search vendor "Mattermost"		Mattermost Server Search vendor "Mattermost" for product "Mattermost Server"				7.7.1 Search vendor "Mattermost" for product "Mattermost Server" and version "7.7.1"		-		Affected
Mattermost Search vendor "Mattermost"		Mattermost Server Search vendor "Mattermost" for product "Mattermost Server"				7.8.0 Search vendor "Mattermost" for product "Mattermost Server" and version "7.8.0"		-		Affected