How severe is CVE-2019-12747?

CVE-2019-12747 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-12747 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-12747?

CVE-2019-12747 affects Typo3. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-12747?

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-2019-12747 published?

CVE-2019-12747 was published on 2019-07-09 and last updated on 2026-06-17.

CVE-2019-12747

CVE-2019-12747 is a high-severity vulnerability in Typo3 with a CVSS 3.x base score of 8.8. 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-502.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Typo3
Published: 2019-07-09
Last modified: 2026-06-17

Description

TYPO3 8.x through 8.7.26 and 9.x through 9.5.7 allows Deserialization of Untrusted Data.

Frequently asked questions

What is CVE-2019-12747?: TYPO3 8.x through 8.7.26 and 9.x through 9.5.7 allows Deserialization of Untrusted Data.
How severe is CVE-2019-12747?: CVE-2019-12747 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-12747 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-12747?: CVE-2019-12747 affects Typo3. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-12747?: 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-2019-12747 published?: CVE-2019-12747 was published on 2019-07-09 and last updated on 2026-06-17.

References

https://typo3.org/security/advisory/typo3-core-sa-2019-020/

Affected products (1)

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

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