CVE-2023-2783

Name: CVE-2023-2783
Creator: NVD / NIST
Published: 2023-06-16T09:15:09.72+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.44%

Last modified Jun 17, 2026

CVE-2023-2783 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. Mattermost Apps Framework fails to verify that a secret provided in the incoming webhook request allowing an attacker to modify the contents of the post sent by the Apps. . EPSS estimates a 0.44% chance of exploitation in the next 30 days.

Description

Mattermost Apps Framework fails to verify that a secret provided in the incoming webhook request allowing an attacker to modify the contents of the post sent by the Apps.

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

0.44%

34.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mattermost	Mattermost	>= 7.8.0, <= 7.8.4
Mattermost	Mattermost	>= 7.9.0, <= 7.9.3
Mattermost	Mattermost	7.10.0

References

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

Timeline

Published: Jun 16, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-2783?

Mattermost Apps Framework fails to verify that a secret provided in the incoming webhook request allowing an attacker to modify the contents of the post sent by the Apps.

How severe is CVE-2023-2783?

CVE-2023-2783 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.44% probability of exploitation in the next 30 days.

How do I fix CVE-2023-2783?

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-2023-2783?

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

Scan your code now

Source: NVD / NIST