What is CVE-2011-3853?

CVE-2011-3853 is a vulnerability in Themehybrid Hybrid, classified under Cross-site Scripting. Published 2011-09-28.

Is CVE-2011-3853 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Themehybrid Hybrid

CVE-2011-3853

Cross-site scripting (XSS) vulnerability in the Hybrid theme before 0.10 for WordPress allows remote attackers to inject arbitrary web script or HTML via the cpage parameter.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2011-09-28 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 4.3 (Medium). Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.015 (73.8th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 73.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Themehybrid Hybrid — versions 0.3, 0.4, 0.5
WordPress

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

20142995/nuclei-templates

References

sitewat.ch/en/Advisories/11 (URL Repurposed, Exploit)

Frequently asked questions

What is CVE-2011-3853?: CVE-2011-3853 is a vulnerability in Themehybrid Hybrid, classified under Cross-site Scripting. Published 2011-09-28.
Is CVE-2011-3853 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.