How severe is CVE-2009-4924?

CVE-2009-4924 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2009-4924 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-4924?

CVE-2009-4924 affects Dan Pascu Python-cjson. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-4924?

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

When was CVE-2009-4924 published?

CVE-2009-4924 was published on 2010-07-02 and last updated on 2026-06-16.

CVE-2009-4924

CVE-2009-4924 is a medium-severity vulnerability in Dan Pascu Python-cjson 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% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Dan Pascu Python-cjson
Published: 2010-07-02
Last modified: 2026-06-16

Description

Dan Pascu python-cjson 1.0.5 does not properly handle a ['/'] argument to cjson.encode, which makes it easier for remote attackers to conduct certain cross-site scripting (XSS) attacks involving Firefox and the end tag of a SCRIPT element.

Frequently asked questions

What is CVE-2009-4924?: Dan Pascu python-cjson 1.0.5 does not properly handle a ['/'] argument to cjson.encode, which makes it easier for remote attackers to conduct certain cross-site scripting (XSS) attacks involving Firefox and the end tag of a SCRIPT element.
How severe is CVE-2009-4924?: CVE-2009-4924 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2009-4924 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-4924?: CVE-2009-4924 affects Dan Pascu Python-cjson. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-4924?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-4924 published?: CVE-2009-4924 was published on 2010-07-02 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:dan_pascu:python-cjson:1.0.5:*:*:*:*:*:*:*

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