How severe is CVE-2013-6853?

CVE-2013-6853 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2013-6853 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-6853?

CVE-2013-6853 primarily affects Yahoo Toolbar. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-6853?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2013-6853 published?

CVE-2013-6853 was published on 2014-01-26 and last updated on 2026-06-17.

CVE-2013-6853

CVE-2013-6853 is a medium-severity vulnerability in Yahoo Toolbar with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Yahoo Toolbar
Published: 2014-01-26
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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 remote attackers to inject arbitrary web script or HTML via a crafted URL that is stored by the victim.
How severe is CVE-2013-6853?: CVE-2013-6853 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2013-6853 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-6853?: CVE-2013-6853 primarily affects Yahoo Toolbar. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-6853?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-6853 published?: CVE-2013-6853 was published on 2014-01-26 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:yahoo:toolbar:3.1.0.20130813024103:*:*:*:*:*:*:*
cpe:2.3:a:yahoo:toolbar:2.5.9.2013418100420:*:*:*:*:*:*:*

More vulnerabilities in Yahoo Toolbar

CVE-2017-2253 — High (CVSS 7.8): Untrusted search path vulnerability in Installer of Yahoo! Toolbar (for Internet explorer) v8.0.0.6 and earlier, with…
CVE-2007-6535 — Medium (CVSS 6.8): Buffer overflow in the YShortcut ActiveX control in YShortcut.dll 2006.8.15.1 in Yahoo! Toolbar might allow attackers…
CVE-2007-6228 — Medium (CVSS 6.8): Stack-based buffer overflow in the Helper class in the yt.ythelper.2 ActiveX control in Yahoo! Toolbar 1.4.1 allows…
CVE-2012-2647 — Medium (CVSS 5.8): Yahoo! Toolbar 1.0.0.5 and earlier for Chrome and Safari allows remote attackers to modify the configured search URL,…

All CVEs affecting Yahoo Toolbar →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →