Security readout for executives and security teams
Plain-English summary
CVE-2019-12747 is a TYPO3 core issue where affected TYPO3 8.x and 9.x versions could deserialize untrusted data. That class of flaw can be serious, but the provided sources do not include CVSS, confirmed impact details, exploit evidence, or explicit fixed-version text.
Executive priority
Prioritize discovery and remediation of affected TYPO3 sites, especially internet-facing or legacy deployments. Business urgency is moderate to high where TYPO3 remains exposed, but exact severity cannot be confirmed from the provided evidence.
Technical view
The CVE describes deserialization of untrusted data in TYPO3 8.x through 8.7.26 and 9.x through 9.5.7. The bundle does not provide the vulnerable component, attack prerequisites, authentication requirements, or impact outcome. Vendor advisory TYPO3-CORE-SA-2019-020 is the primary remediation reference.
Likely exposure
Exposure is likely limited to organizations running TYPO3 8.x up to 8.7.26 or TYPO3 9.x up to 9.5.7. The source bundle does not state whether exposure requires public access, backend access, extensions, or specific configuration.
Exploitation context
The provided data does not show CISA KEV listing or other cited evidence of active exploitation. Treat exploit status as unconfirmed. Public disclosure occurred on July 9, 2019, so affected legacy installations should be reviewed carefully.
Researcher notes
Key missing details are CVSS score, CWE mapping, vulnerable code path, authentication requirement, impact, fixed versions, and proof of exploitation. Use the TYPO3 advisory and CVE record as starting points, and avoid assuming exploitability beyond the deserialization finding.
Mitigation direction
- Inventory TYPO3 instances and record exact core versions.
- Check TYPO3-CORE-SA-2019-020 for official remediation guidance.
- Upgrade affected TYPO3 installations to a supported non-affected release.
- Review vendor guidance before applying compensating controls.
- Retire unsupported TYPO3 instances where upgrade is impractical.
Validation and detection
- Confirm whether any TYPO3 8.x or 9.x installations remain deployed.
- Compare detected versions against 8.7.26 and 9.5.7 boundaries.
- Verify remediation against the TYPO3 advisory, not assumptions.
- Check asset inventory for forgotten staging or legacy sites.
- Document any affected instance, owner, exposure, and remediation status.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2019-12747 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://typo3.org/security/advisory/typo3-core-sa-2019-020/CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.