CVE-2023-39598
Published: 05 September 2023
Summary
CVE-2023-39598 is a medium-severity Cross-site Scripting (CWE-79) vulnerability in Icewarp Webclient. Its CVSS base score is 6.1 (Medium).
Operationally, ranked in the top 1.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2023-39598 is a reflected cross-site scripting vulnerability (CWE-79) affecting IceWarp Corporation WebClient version 10.2.1. The flaw resides in the handling of the mid parameter and carries a CVSS 3.1 score of 6.1, reflecting network attack vector, low attack complexity, no required privileges, and required user interaction with changed scope.
A remote attacker can supply a crafted payload to the mid parameter in a link or request; when a user interacts with the malicious URL, arbitrary script executes in the victim's browser context, enabling theft of session data or other client-side actions.
The provided references consist solely of a disclosure write-up with no accompanying vendor advisory or patch information. The EPSS score has remained flat at its peak value of 0.5638 since publication, indicating no observed increase in exploitation interest.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-43307
Vulnerability details
Cross Site Scripting vulnerability in IceWarp Corporation WebClient v.10.2.1 allows a remote attacker to execute arbitrary code via a crafted payload to the mid parameter.
- 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.