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Fencer Vulns
medium 4.3

CVE-2009-3539 json

Multiple cross-site scripting (XSS) vulnerabilities in YourFreeWorld Ultra Classifieds Pro allow remote attackers to inject arbitrary web s…

published 2009-10-02 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-3521

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits
2
Exploit-DB

Summary

Multiple cross-site scripting (XSS) vulnerabilities in YourFreeWorld Ultra Classifieds Pro allow remote attackers to inject arbitrary web script or HTML via the (1) cname parameter to subclass.php and the (2) sn parameter to listads.php.

Timeline

  1. First public exploit (EDB-34745)
  2. Published

Exploit prediction

1.69% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-34745 YourFreeWorld Ultra Classifieds - 'subclass.php?cname' Cross-Site Scripting webapps, 2009-07-20
  • EDB-34744 YourFreeWorld Ultra Classifieds - 'listads.php' Multiple Cross-Site Scripting Vulnerabilities webapps, 2009-07-20
  • packetstormsecurity.org http://packetstormsecurity.org/0907-exploits/ultraclassifieds-xss.txt referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.