Cross-site scripting (XSS) vulnerability in W3C Jigsaw Proxy Server before 2.2.1 allows remote attackers to execute arbitrary script via a URL that contains a reference to a nonexistent host followed by the script, which is included in the resulting error message.
Conclusion & alert: CVE-2002-1053 is rated Moderate Risk (56.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.65%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2025-12-17 | 1.28% | 1.65% | +0.37% |
| 2 | 2025-09-10 | 1.05% | 1.28% | +0.23% |
| 3 | 2025-03-30 | — | 1.05% | — |
Full EPSS history (9 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 6.8 | 2.0 | MEDIUM |
|
8.6 | 6.4 | [email protected] |
| URL | Tags |
|---|---|
| http://archives.neohapsis.com/archives/bugtraq/2002-08/0190.html | |
| http://www.iss.net/security_center/static/9914.php | Patch Vendor Advisory |
| http://www.osvdb.org/4015 | |
| http://www.securityfocus.com/bid/5506 | Patch Vendor Advisory |
| http://www.w3.org/Jigsaw/RelNotes.html#2.2.1 |