How severe is CVE-2009-4976?

CVE-2009-4976 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2009-4976 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-4976?

CVE-2009-4976 primarily affects Urs Wolfer Kwebkitpart. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-4976?

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

When was CVE-2009-4976 published?

CVE-2009-4976 was published on 2010-08-02 and last updated on 2026-06-16.

CVE-2009-4976

CVE-2009-4976 is a medium-severity vulnerability in Urs Wolfer Kwebkitpart 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: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Urs Wolfer Kwebkitpart
Published: 2010-08-02
Last modified: 2026-06-16

Description

Cross-site scripting (XSS) vulnerability in webkitpart.cpp in kwebkitpart allows remote attackers to inject arbitrary web script or HTML via a URL associated with a nonexistent domain name, related to a "universal XSS" issue, a similar vulnerability to CVE-2010-2536.

Frequently asked questions

What is CVE-2009-4976?: Cross-site scripting (XSS) vulnerability in webkitpart.cpp in kwebkitpart allows remote attackers to inject arbitrary web script or HTML via a URL associated with a nonexistent domain name, related to a "universal XSS" issue, a similar vulnerability to CVE-2010-2536.
How severe is CVE-2009-4976?: CVE-2009-4976 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2009-4976 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-4976?: CVE-2009-4976 primarily affects Urs Wolfer Kwebkitpart. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-4976?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-4976 published?: CVE-2009-4976 was published on 2010-08-02 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:urs_wolfer:kwebkitpart:*:*:*:*:*:*:*:*
cpe:2.3:a:urs_wolfer:kwebkitpart:0.9.6:beta:*:*:*:*:*:*

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