Description

Mattermost fails to validate links on external websites when constructing a preview for a linked website, allowing an attacker to cause a denial-of-service by a linking to a specially crafted webpage in a message.

Classification

CVE ID: CVE-2023-2793

CVSS Base Severity: MEDIUM

CVSS Base Score: 6.5

Affected Products

Vendor: Mattermost

Product: Mattermost

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.09% (probability of being exploited)

EPSS Percentile: 38.28% (scored less or equal to compared to others)

EPSS Date: 2025-02-03 (when was this score calculated)

References

https://mattermost.com/security-updates/

Timeline