What’s Vulnerable › Vulnerabilities

CVE-2019-19849

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-12-17 · updated 2026-06-17
• Weakness: CWE-502

Description

An issue was discovered in TYPO3 before 8.7.30, 9.x before 9.5.12, and 10.x before 10.2.2. It has been discovered that the classes QueryGenerator and QueryView are vulnerable to insecure deserialization. One exploitable scenario requires having the system extension ext:lowlevel (Backend Module: DB Check) installed, with a valid backend user who has administrator privileges. The other exploitable scenario requires having the system extension ext:sys_action installed, with a valid backend user who has limited privileges.

Affected products

• typo3: before 8.7.30; from 9.0.0 before 9.5.12; from 10.0.0 before 10.2.2 — fixed in 10.2.2, 8.7.30, 9.5.12

How to fix

Upgrade to a fixed version: typo3 10.2.2, 8.7.30, 9.5.12. Check the vendor advisory for mitigations.

References

• https://review.typo3.org/q/%2522Resolves:+%252389005%2522+topic:security
• https://typo3.org/security/advisory/typo3-core-sa-2019-026/
• https://review.typo3.org/q/%2522Resolves:+%252389005%2522+topic:security
• https://typo3.org/security/advisory/typo3-core-sa-2019-026/

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