CVE-2023-5330

Name: CVE-2023-5330
Creator: NVD / NIST
Published: 2023-10-09T11:15:11.197+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.50%

Last modified Jun 17, 2026

CVE-2023-5330 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Mattermost fails to enforce a limit for the size of the cache entry for OpenGraph data allowing an attacker to send a specially crafted request to the /api/v4/opengraph filling the cache and turning the server unavailable. . EPSS estimates a 0.50% chance of exploitation in the next 30 days.

Description

Mattermost fails to enforce a limit for the size of the cache entry for OpenGraph data allowing an attacker to send a specially crafted request to the /api/v4/opengraph filling the cache and turning the server unavailable.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.50%

38.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mattermost	Mattermost Server	< 7.8.11
Mattermost	Mattermost Server	>= 8.0.0, < 8.0.3
Mattermost	Mattermost Server	>= 8.1.0, < 8.1.2

References

https://mattermost.com/security-updatesVendor Advisory
https://mattermost.com/security-updatesVendor Advisory

Timeline

Published: Oct 9, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-5330?

How severe is CVE-2023-5330?

CVE-2023-5330 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.50% probability of exploitation in the next 30 days.

How do I fix CVE-2023-5330?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-5330?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST