CVE-2023-1892
Published: 21 April 2023
Summary
CVE-2023-1892 is a critical-severity Cross-site Scripting (CWE-79) vulnerability in Contribsys Sidekiq. Its CVSS base score is 9.6 (Critical).
Operationally, ranked in the top 1.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
CVE-2023-1892 is a reflected cross-site scripting vulnerability (CWE-79) affecting the Sidekiq background job processing library in GitHub repository sidekiq/sidekiq versions prior to 7.0.8. The flaw carries a CVSS 3.1 score of 9.6, reflecting network attack vector, low complexity, no required privileges, required user interaction, changed scope, and high impact on confidentiality, integrity, and availability.
An attacker can exploit the issue by supplying a crafted input that is reflected back to a victim user without adequate sanitization, allowing execution of arbitrary script code in the context of the Sidekiq web interface. Successful exploitation can lead to full compromise of the affected user's session and data within the application.
Public references point to a fix committed in Sidekiq 7.0.8 that addresses the reflected XSS vector; organizations are advised to upgrade to this or a later release to eliminate the exposure.
EPSS for the CVE reached a peak of 0.8161 before receding to the current value of 0.7206, indicating sustained but slightly diminished exploitation interest after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-1317
Vulnerability details
Cross-site Scripting (XSS) - Reflected in GitHub repository sidekiq/sidekiq prior to 7.0.8.
- 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.