CVE-2021-31911 json
In JetBrains TeamCity before 2020.2.3, reflected XSS was possible on several pages.
published 2021-05-11 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-18786
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 55%
- public exploits
- 0
- none known
Summary
In JetBrains TeamCity before 2020.2.3, reflected XSS was possible on several pages.
Patch / fix
- jetbrains teamcity 2020.2.3
Exploit prediction
0.75% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
blog.jetbrains.com
vendor-advisory
-
blog.jetbrains.com
/blog/2021/05/07/jetbrains-security-bulletin-q1-2021/
vendor-advisory
Sources
- CVE List CVE-2021-31911
- NVD CVE-2021-31911
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.