How severe is CVE-2009-3633?

CVE-2009-3633 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2009-3633 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-3633?

CVE-2009-3633 primarily affects Typo3. In total, 59 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-3633?

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

When was CVE-2009-3633 published?

CVE-2009-3633 was published on 2009-11-02 and last updated on 2026-06-16.

CVE-2009-3633

CVE-2009-3633 is a medium-severity vulnerability in Typo3 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-352.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Typo3
Published: 2009-11-02
Last modified: 2026-06-16

Description

Cross-site scripting (XSS) vulnerability in the t3lib_div::quoteJSvalue API function in TYPO3 4.0.13 and earlier, 4.1.x before 4.1.13, 4.2.x before 4.2.10, and 4.3.x before 4.3beta2 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors related to the sanitizing algorithm.

Frequently asked questions

What is CVE-2009-3633?: Cross-site scripting (XSS) vulnerability in the t3lib_div::quoteJSvalue API function in TYPO3 4.0.13 and earlier, 4.1.x before 4.1.13, 4.2.x before 4.2.10, and 4.3.x before 4.3beta2 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors related to the sanitizing algorithm.
How severe is CVE-2009-3633?: CVE-2009-3633 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2009-3633 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-3633?: CVE-2009-3633 primarily affects Typo3. In total, 59 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-3633?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-3633 published?: CVE-2009-3633 was published on 2009-11-02 and last updated on 2026-06-16.

References

Affected products (59)

cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:0.1.2:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:1.0.14:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:1.1:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:1.1.1:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:1.1.09:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:1.1.10:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:1.2.0:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:1.3.0:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:1.3.2:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:3.0:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:3.3.x:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:3.5:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:3.5.x:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:3.6.x:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:3.7.0:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:3.7.1:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:3.7.x:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:3.8:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:3.8.x:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.0:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.0.1:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.0.2:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.0.3:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.0.4:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.0.5:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.0.6:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.0.7:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.0.8:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.0.9:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.0.10:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.0.11:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.1.0:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.1.0:beta1:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.1.0:rc1:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.1.1:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.1.2:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.1.3:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.1.4:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.1.5:*:*:*:*:*:*:*

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