XSS in Wren Security Wrensec-Commons
CVE-2026-2102
wrensec-commons contains a reflected cross-site scripting (XSS) vulnerability in the CREST framework's HTTP binding. The HttpUtils.prepareResponse() method used the _mimeType request parameter to set the Content-Type response header without proper sanitization. By sending a GET request with _mimeType=text/html, an attacker could cause the browser to interpret a CREST JSON response as HTML, enabling execution of arbitrary JavaScript in the victim's browser. The vulnerability is exploitable by tricking a user into visiting a crafted URL targeting any deployed CREST endpoint. The issue is fixed in versions 22.6.2 and 23.0.0.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- b6ef82d7-f637-461b-aedd-74f5857d5f5b (third-party-advisory)
- b6ef82d7-f637-461b-aedd-74f5857d5f5b (patch)
- b6ef82d7-f637-461b-aedd-74f5857d5f5b (patch)
Frequently asked questions
- What is CVE-2026-2102?
- CVE-2026-2102 is a medium-severity vulnerability in Wren Security Wrensec-Commons, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-11-02.
- How severe is CVE-2026-2102?
- Medium severity. CVSS v3 base score is 6.1 out of 10.