What is CVE-2023-5196?

CVE-2023-5196 is a medium-severity vulnerability in Mattermost, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2023-09-29.

How severe is CVE-2023-5196?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2023-5196 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in Mattermost

CVE-2023-5196

Mattermost fails to enforce character limits in all possible notification props allowing an attacker to send a really long value for a notification_prop resulting in the server consuming an abnormal quantity of computing resources and possibly becoming temporarily unavailable for its users.

Vulnerability class: DoS (Denial of Service)

EPSS: 0.006 (43.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Mattermost — versions 0, 8.1.0, 7.8.10

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

responsibledisclosure@mattermost.com (Vendor Advisory)

Frequently asked questions

What is CVE-2023-5196?: CVE-2023-5196 is a medium-severity vulnerability in Mattermost, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2023-09-29.
How severe is CVE-2023-5196?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2023-5196 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.