How severe is CVE-2009-4855?

CVE-2009-4855 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2009-4855 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-4855?

CVE-2009-4855 affects Typo3. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-4855?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2009-4855 published?

CVE-2009-4855 was published on 2010-05-11 and last updated on 2026-06-16.

CVE-2009-4855

CVE-2009-4855 is a high-severity vulnerability in Typo3 with a CVSS 2.0 base score of 7.5. 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-89.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-89
Affected product: Typo3
Published: 2010-05-11
Last modified: 2026-06-16

Description

SQL injection vulnerability in index.php in TYPO3 4.0 allows remote attackers to execute arbitrary SQL commands via the showUid parameter. NOTE: the TYPO3 Security Team disputes this report, stating that "there is no such vulnerability... The showUid parameter is generally used in third-party TYPO3 extensions - not in TYPO3 Core.

Frequently asked questions

What is CVE-2009-4855?: SQL injection vulnerability in index.php in TYPO3 4.0 allows remote attackers to execute arbitrary SQL commands via the showUid parameter. NOTE: the TYPO3 Security Team disputes this report, stating that "there is no such vulnerability... The showUid parameter is generally used in third-party TYPO3 extensions - not in TYPO3 Core.
How severe is CVE-2009-4855?: CVE-2009-4855 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2009-4855 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-4855?: CVE-2009-4855 affects Typo3. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-4855?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2009-4855 published?: CVE-2009-4855 was published on 2010-05-11 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:typo3:typo3:4.0:*:*:*:*:*:*:*

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