7.5

CVE-2018-21248: mattermost mattermost_server Insufficiently Protected Credentials

CVSS: 7.5v3.1HighModified
Published 19-06-2020Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2018-21248 is a high (CVSS 7.5) Insufficiently Protected Credentials vulnerability in mattermost mattermost_server. EPSS estimates a 1.23% chance of exploitation in the next 30 days, higher than 68.5% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
1.23%
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. 19-06-2020
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

An issue was discovered in Mattermost Server before 5.4.0. It mishandles possession of superfluous authentication credentials.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

1.23%

Chance of exploitation in the next 30 days

Percentile

69%

Versus all other CVEs

30-day change

0.00 pp

From 1.23% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.23%

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

1 vendor · 1 product

References

1 links