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Fencer Intel
medium 4.3

CVE-2011-5257 json

Multiple cross-site scripting (XSS) vulnerabilities in the Classipress theme before 3.1.5 for WordPress allow remote attackers to inject ar…

published 2013-02-12 13 y ago modified 2026-06-16 4 mo ago also EUVD-2011-5156

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.8%
EPSS 3.8% chance of exploitation in 30 days, percentile 90%
public exploits
1
Exploit-DB

Summary

Multiple cross-site scripting (XSS) vulnerabilities in the Classipress theme before 3.1.5 for WordPress allow remote attackers to inject arbitrary web script or HTML via the (1) twitter_id parameter related to the Twitter widget and (2) facebook_id parameter related to the Facebook widget.

Timeline

  1. First public exploit (EDB-18053)
  2. Published

Exploit prediction

3.79% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-18053 WordPress Theme classipress 3.1.4 - Persistent Cross-Site Scripting webapps, 2011-10-31

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 Intel 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.