How severe is CVE-2013-4321?

CVE-2013-4321 has a CVSS 2.0 base score of 6.5, rated medium severity.

Is CVE-2013-4321 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4321?

CVE-2013-4321 primarily affects Typo3. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-4321?

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

When was CVE-2013-4321 published?

CVE-2013-4321 was published on 2014-05-20 and last updated on 2026-06-16.

CVE-2013-4321

CVE-2013-4321 is a medium-severity vulnerability in Typo3 with a CVSS 2.0 base score of 6.5. 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-94.

Key facts

Severity: Medium (CVSS 2.0 base score 6.5)
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Typo3
Published: 2014-05-20
Last modified: 2026-06-16

Description

The File Abstraction Layer (FAL) in TYPO3 6.0.x before 6.0.8 and 6.1.x before 6.1.4 allows remote authenticated editors to execute arbitrary PHP code via unspecified characters in the file extension when renaming a file. NOTE: this vulnerability exists because of an incomplete fix for CVE-2013-4250.

Frequently asked questions

What is CVE-2013-4321?: The File Abstraction Layer (FAL) in TYPO3 6.0.x before 6.0.8 and 6.1.x before 6.1.4 allows remote authenticated editors to execute arbitrary PHP code via unspecified characters in the file extension when renaming a file. NOTE: this vulnerability exists because of an incomplete fix for CVE-2013-4250.
How severe is CVE-2013-4321?: CVE-2013-4321 has a CVSS 2.0 base score of 6.5, rated medium severity.
Is CVE-2013-4321 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4321?: CVE-2013-4321 primarily affects Typo3. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-4321?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-4321 published?: CVE-2013-4321 was published on 2014-05-20 and last updated on 2026-06-16.

References

https://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2013-003/

Affected products (12)

cpe:2.3:a:typo3:typo3:6.1:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:6.1.1:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:6.1.2:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:6.1.3:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:6.0:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:6.0.1:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:6.0.2:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:6.0.3:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:6.0.4:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:6.0.5:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:6.0.6:*:*:*:*:*:*:*
cpe:2.3:a:typo3:typo3:6.0.7:*:*:*:*:*:*:*

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