CVE-2023-25763
Published: 15 February 2023
Summary
CVE-2023-25763 is a medium-severity Cross-site Scripting (CWE-79) vulnerability in Jenkins Email Extension. Its CVSS base score is 5.4 (Medium).
Operationally, ranked in the top 4.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
Jenkins Email Extension Plugin 2.93 and earlier contains a stored cross-site scripting vulnerability because the plugin does not escape various fields included in its bundled email templates. The affected component is the Jenkins Email Extension Plugin, which processes these unescaped fields when generating notifications.
Attackers who can control the affected fields are able to inject malicious scripts that execute in the browsers of users viewing the resulting emails or related Jenkins pages. Successful exploitation yields limited impact on confidentiality and integrity with no availability effect, consistent with the reported CVSS 5.4 vector requiring low-privileged access and user interaction.
Advisories published by the Jenkins project and coordinated through the oss-security mailing list on 2023-02-15 address the issue under identifier SECURITY-2931 and recommend applying the corresponding plugin update. The EPSS score has remained flat at a peak of 0.2059 with no material increase observed after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-0717
Vulnerability details
Jenkins Email Extension Plugin 2.93 and earlier does not escape various fields included in bundled email templates, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to control affected fields.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.
Validates web inputs to reject script-related content that could produce XSS.
Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.