CVE-2015-7580: Rails html sanitizer Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-ghqm-pgxj-37gq
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CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2015-7580 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Rails html sanitizer libraries in the RubyGems ecosystem. The issue involves rails-html-sanitizer cross-site scripting vulnerability. Remediation is available by upgrading affected packages to version 1.0.3.

CVE-2015-7580 at a Glance

CVE Identifier CVE-2015-7580
GHSA Identifier GHSA-ghqm-pgxj-37gq
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Rails html sanitizer
Package Ecosystem RubyGems
Published Date
Last Updated

Security Impact

CVSS: 6.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2015-7580

To remediate this vulnerability, upgrade all affected Rails html sanitizer dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

rails-html-sanitizer fixed: 1.0.3 
Upgrade rails-html-sanitizer to 1.0.3
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for rails-html-sanitizer

How to Check if You Are Affected

To determine whether your application is affected by CVE-2015-7580, inspect your project dependencies for Rails html sanitizer:

inspect dependencies for rails-html-sanitizer

Analyze the terminal output to locate any version of Rails html sanitizer in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.0.3), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Rails html sanitizer, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Cross-site scripting (XSS) vulnerability in `lib/rails/html/scrubbers.rb` 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 a crafted CDATA node.

CVE-2015-7580 Affected Rails html sanitizer Versions

1 component(s)
Fixed Versions:
1.0.3
Product / Package Ecosystem Affected Versions Fixed Version
rails-html-sanitizer
gem/rails-html-sanitizer
RubyGems
< 1.0.3
1.0.3

References

NVD — CVE-2015-7580 NVD
https://nvd.nist.gov/vuln/detail/CVE-2015-7580
Security Fix Commit FIX COMMIT
https://github.com/rails/rails-html-sanitizer/commit/63903b0eaa6d2a4e1c91bc86008256c4c8335e78
Rails html sanitizer Source Repository REPOSITORY
https://github.com/rails/rails-html-sanitizer
groups.google.com/forum/message/raw WEB
https://groups.google.com/forum/message/raw?msg=rubyonrails-security/uh--W4TDwmI/m_CVZtdbFQAJ
Rails html sanitizer Security Information SECURITY
https://web.archive.org/web/20160128075017/http://www.securitytracker.com/id/1034816
Rails html sanitizer Security Information SECURITY
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00014.html
Rails html sanitizer Security Information SECURITY
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00024.html
Rails html sanitizer Security Information SECURITY
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00053.html
Rails html sanitizer Security Information SECURITY
http://www.openwall.com/lists/oss-security/2016/01/25/15

Frequently Asked Questions

What is CVE-2015-7580?
CVE-2015-7580 is a security vulnerability in Rails html sanitizer involving rails-html-sanitizer Cross-site Scripting vulnerability under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Rails html sanitizer versions are affected?
Affected versions include releases prior to 1.0.3 across affected packages: rails-html-sanitizer.
What version fixes CVE-2015-7580?
Upgrading to 1.0.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is rails-html-sanitizer affected?
Yes, rails-html-sanitizer is affected in releases prior to 1.0.3. Upgrade your dependency to 1.0.3 or later.
What is the CVSS score of CVE-2015-7580?
CVE-2015-7580 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2015-7580?
CVE-2015-7580 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check RubyGems dependencies for CVE-2015-7580?
Run the dependency tree command: 'inspect dependencies for rails-html-sanitizer'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-ghqm-pgxj-37gq",
  "modified" : "2023-01-23T21:16:04Z",
  "published" : "2017-10-24T18:33:36Z",
  "aliases" : [ "CVE-2015-7580" ],
  "summary" : "rails-html-sanitizer Cross-site Scripting vulnerability",
  "details" : "Cross-site scripting (XSS) vulnerability in `lib/rails/html/scrubbers.rb` 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 a crafted CDATA node.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "rails-html-sanitizer"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.0.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2015-7580"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rails/rails-html-sanitizer/commit/63903b0eaa6d2a4e1c91bc86008256c4c8335e78"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rails/rails-html-sanitizer"
  }, {
    "type" : "WEB",
    "url" : "https://groups.google.com/forum/message/raw?msg=rubyonrails-security/uh--W4TDwmI/m_CVZtdbFQAJ"
  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20160128075017/http://www.securitytracker.com/id/1034816"
  }, {
    "type" : "WEB",
    "url" : "http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00014.html"
  }, {
    "type" : "WEB",
    "url" : "http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00024.html"
  }, {
    "type" : "WEB",
    "url" : "http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00053.html"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2016/01/25/15"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:37:28Z",
    "nvd_published_at" : null
  }
}