What is CVE-2015-7578?

CVE-2015-7578 is a medium-severity vulnerability in Rubyonrails HTML Sanitizer, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2016-02-16.

How severe is CVE-2015-7578?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2015-7578 known to be exploited?

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

XSS in Rubyonrails HTML Sanitizer

CVE-2015-7578

Cross-site scripting (XSS) vulnerability in the rails-html-sanitizer gem before 1.0.3 for Ruby on Rails 4.2.x and 5.x allows remote attackers to inject arbitrary web script or HTML via crafted tag attributes.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2016-02-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.025 (83.9th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 83.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.025 · newest: 0.025 · change: 0.000

Affected products

Rubyonrails HTML Sanitizer
Rubyonrails Rails — versions 4.2.0, 4.2.1, 4.2.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

lists.fedoraproject.org/pipermail/package-announce/2016-February/178046.html (vendor-advisory)
www.openwall.com/lists/oss-security/2016/01/25/11 (mailing-list)
lists.opensuse.org/opensuse-security-announce/2016-04/msg00053.html (vendor-advisory)
github.com/rails/rails-html-sanitizer/commit/297161e29a3e11186ce4c02bf7defc088b…
www.securitytracker.com/id/1034816 (vdb-entry)
groups.google.com/forum/message/raw (mailing-list)
lists.fedoraproject.org/pipermail/package-announce/2016-February/178064.html (vendor-advisory)
lists.opensuse.org/opensuse-security-announce/2016-02/msg00024.html (vendor-advisory)
lists.opensuse.org/opensuse-security-announce/2016-02/msg00014.html (vendor-advisory)

Frequently asked questions

What is CVE-2015-7578?: CVE-2015-7578 is a medium-severity vulnerability in Rubyonrails HTML Sanitizer, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2016-02-16.
How severe is CVE-2015-7578?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2015-7578 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.