CVE-2021-43186
CVE-2021-43186 is a medium-severity vulnerability in Jetbrains Youtrack with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.
Key facts
- Severity: Medium (CVSS 3.x base score 5.4)
- CVSS v2: 3.5
- EPSS exploit prediction: 1% (42nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: Jetbrains Youtrack
- Published:
- Last modified:
Description
JetBrains YouTrack before 2021.3.24402 is vulnerable to stored XSS.
Frequently asked questions
- What is CVE-2021-43186?
- JetBrains YouTrack before 2021.3.24402 is vulnerable to stored XSS.
- How severe is CVE-2021-43186?
- CVE-2021-43186 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2021-43186 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-43186?
- CVE-2021-43186 affects Jetbrains Youtrack. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-43186?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-43186 published?
- CVE-2021-43186 was published on 2021-11-09 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:jetbrains:youtrack:*:*:*:*:*:*:*:*
More vulnerabilities in Jetbrains Youtrack
- CVE-2022-24442 — Critical (CVSS 9.8): JetBrains YouTrack before 2021.4.40426 was vulnerable to SSTI (Server-Side Template Injection) via FreeMarker templates.
- CVE-2021-43185 — Critical (CVSS 9.8): JetBrains YouTrack before 2021.3.23639 is vulnerable to Host header injection.
- CVE-2021-25770 — Critical (CVSS 9.8): In JetBrains YouTrack before 2020.5.3123, server-side template injection (SSTI) was possible, which could lead to code…
- CVE-2019-12852 — Critical (CVSS 9.8): An SSRF attack was possible on a JetBrains YouTrack server. The issue (1 of 2) was fixed in JetBrains YouTrack…
- CVE-2019-12867 — Critical (CVSS 9.8): Certain actions could cause privilege escalation for issue attachments in JetBrains YouTrack. The issue was fixed in…
- CVE-2019-12866 — Critical (CVSS 9.8): An Insecure Direct Object Reference, with Authorization Bypass through a User-Controlled Key, was possible in JetBrains…
All CVEs affecting Jetbrains Youtrack →
Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities
- CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
- CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
- CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
- CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
- CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
- CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…
Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →