7.1

CVE-2021-37859: mattermost Cross-site Scripting

CVSS: 7.1v3.1HighModified
Published 05-08-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2021-37859 is a high (CVSS 7.1) Cross-site Scripting vulnerability in mattermost. EPSS estimates a 3.29% chance of exploitation in the next 30 days, higher than 88.3% of scored vulnerabilities.

Overall risk
29/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v3.1 (CVE.org)
EPSS score
3.29%
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. 05-08-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

Fixed a bypass for a reflected cross-site scripting vulnerability affecting OAuth-enabled instances of Mattermost.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

3.29%

Chance of exploitation in the next 30 days

Percentile

88%

Versus all other CVEs

30-day change

0.00 pp

From 3.29% on 20-09-2026

20-09-202620-10-2026
EPSS score
3.29%

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≥ 5.32.0, ≤ 5.36.0 | ≥ 5.32.0, < 5.34.5 | ≥ 5.35.0, < 5.35.4 | ≥ 5.36.0, < 5.36.1

1 vendor · 1 product

References

1 links