How severe is CVE-2009-0816?

CVE-2009-0816 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2009-0816 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0816?

CVE-2009-0816 primarily affects Typo3. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0816?

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

When was CVE-2009-0816 published?

CVE-2009-0816 was published on 2009-03-05 and last updated on 2026-06-16.

CVE-2009-0816

CVE-2009-0816 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-79.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Typo3
Published: 2009-03-05
Last modified: 2026-06-16

Description

Multiple cross-site scripting (XSS) vulnerabilities in the backend user interface in TYPO3 3.3.x through 3.8.x, 4.0 before 4.0.12, 4.1 before 4.1.10, 4.2 before 4.2.6, and 4.3alpha1 allow remote attackers to inject arbitrary web script or HTML via unspecified fields.

Frequently asked questions

What is CVE-2009-0816?: Multiple cross-site scripting (XSS) vulnerabilities in the backend user interface in TYPO3 3.3.x through 3.8.x, 4.0 before 4.0.12, 4.1 before 4.1.10, 4.2 before 4.2.6, and 4.3alpha1 allow remote attackers to inject arbitrary web script or HTML via unspecified fields.
How severe is CVE-2009-0816?: CVE-2009-0816 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2009-0816 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0816?: CVE-2009-0816 primarily affects Typo3. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-0816?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-0816 published?: CVE-2009-0816 was published on 2009-03-05 and last updated on 2026-06-16.

References

Affected products (28)

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:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.1.6:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.1.7:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.1.8:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.1.9:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.2:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.2.1:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.2.2:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.2.3:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.2.4:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:4.2.5:*:*:*:*:*:*:*

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