6.5

CVE-2023-2787: mattermost Missing Authorization

CVSS: 6.5v3.1MediumModified
Published 16-06-2023Last modified 06-12-2024
Open JSON

Vulnerability summary

CVE-2023-2787 is a medium (CVSS 6.5) Missing Authorization vulnerability in mattermost. EPSS estimates a 0.54% chance of exploitation in the next 30 days, higher than 44.3% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.54%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 16-06-2023
    PublishedVulnerability first disclosed.
  2. 06-12-2024
    Last modifiedVulnerability information updated.

Description

Mattermost fails to check channel membership when accessing message threads, allowing an attacker to access arbitrary posts by using the message threads API.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.54%

Chance of exploitation in the next 30 days

Percentile

44%

Versus all other CVEs

30-day change

0.00 pp

From 0.54% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.54%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Mattermost1 product
  • mattermost≤ 7.9.3 | ≤ 7.8.4 | ≤ 7.1.9 | ≥ 7.1.0, ≤ 7.1.9 | ≥ 7.8.0, ≤ 7.8.4 | ≥ 7.9.0, ≤ 7.9.3 | 7.10.0

1 vendor · 1 product

References

1 links