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Vulnerabilities

Vulnerability · CVE-2013-6853

Cross-site scripting (XSS) vulnerability in clickstream.js in Y! Toolbar plugin for FireFox 3.1.0.20130813024103 for Mac, and 2.5.9.2013418100420 for Windows, allows r…

Published Jan 26, 2014 · catalog updated Jun 17, 2026 · Apple

Check if you run it

No confirmed exploitation is on record for CVE-2013-6853. EPSS is 1.93%. Act only if a listed version of Apple is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium4.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.93%
Remediation
Advisory link
Affected products
cpe yahoo/toolbar

Cross-site scripting (XSS) vulnerability in clickstream.js in Y! Toolbar plugin for FireFox 3.1.0.20130813024103 for Mac, and 2.5.9.2013418100420 for Windows, allows remote attackers to inject arbitrary web script or HTML via a crafted URL that is stored by the victim.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe yahoo/toolbar2.5.9.2013418100420
  • cpe yahoo/toolbar3.1.0.20130813024103

How to fix CVE-2013-6853

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2013-6853. EPSS is 1.93%. Act only if a listed version of Apple is installed.

Which versions are affected?

Compare what you have installed with 2.5.9.2013418100420, 3.1.0.20130813024103. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-79: Cross-site Scripting (XSS). EPSS 1.93%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 26, 2014 · Apple Security Releases

    Detected

    Cross-site scripting (XSS) vulnerability in clickstream.js in Y! Toolbar plugin for FireFox 3.1.0.20130813024103 for Mac, and 2.5.9.2013418100420 for Windows, allows remote attackers to inject arbitrary web script or HTML via a crafted URL that is stored by the victim.

  2. Jun 17, 2026 · Apple Security Releases

    Updated

    Cross-site scripting (XSS) vulnerability in clickstream.js in Y! Toolbar plugin for FireFox 3.1.0.20130813024103 for Mac, and 2.5.9.2013418100420 for Windows, allows remote attackers to inject arbitrary web script or HTML via a crafted URL that is stored by the victim.

Sources

  • Apple Security ReleasesVendor advisoryCVE-2013-6853

    Cross-site scripting (XSS) vulnerability in clickstream.js in Y! Toolbar plugin for FireFox 3.1.0.20130813024103 for Mac, and 2.5.9.2013418100420 for Windows, allows remote attackers to inject arbitrary web script or HTML via a crafted URL that is stored by the victim.

    nvd.nist.gov
  • CVE.orgVulnerability recordCVE-2013-6853

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2013-6853

    30-day exploitation probability 1.9%

    first.org
  • Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/124800/Y-Toolbar-Cross-Site-Scripting.html

    Packet Storm link already published on the finding.

    packetstormsecurity.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.