6.1

CVE-2021-31903: jetbrains youtrack Cross-site Scripting

CVSS: 6.1v3.1MediumModified
Published 11-05-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-31903 is a medium (CVSS 6.1) Cross-site Scripting vulnerability in jetbrains youtrack. EPSS estimates a 0.78% chance of exploitation in the next 30 days, higher than 55% of scored vulnerabilities.

Overall risk
25/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.1/10
010
Medium · v3.1 (NVD)
EPSS score
0.78%
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. 11-05-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

In JetBrains YouTrack before 2021.1.9819, a pull request's title was sanitized insufficiently, leading to XSS.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

0.78%

Chance of exploitation in the next 30 days

Percentile

55%

Versus all other CVEs

30-day change

0.00 pp

From 0.78% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.78%

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

Jetbrains1 product

1 vendor · 1 product

References

2 links