CVE-2023-3615

Lack of server certificate validation in websockets connection

HIGH

8.1

CVSS Score

Published: July 17, 2023 at 03:33 PM UTC

Updated: June 17, 2026 at 06:14 AM UTC

1 product affected across 1 vendorMattermost

Using Mattermost iOS app by Mattermost?

Get instant alerts when new vulnerabilities affect Mattermost iOS app - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

HIGH8.1

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

Description

Mattermost iOS app fails to properly validate the server certificate while initializing the TLS connection allowing a network attacker to intercept the WebSockets connection.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Mattermost · Mattermost

95%

v ≤ 2.5.0v < 2.5.1

Vendor states this is fixed in 2.5.1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://mattermost.com/security-updates

References (1)

Vendor Advisory

Source: [email protected]

https://mattermost.com/security-updates

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.1HIGHMattermost

Attack Vector: NETWORK
Complexity: HIGH
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-295

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create account Sign in

Free plan, no card