Security readout for executives and security teams
Plain-English summary
TYPO3’s Extension Manager could mishandle manually uploaded ZIP archives, allowing directory traversal during extraction. An attacker would need backend administrative access, and newer affected branches also require System Maintainer privileges. This is mainly a risk where privileged accounts are compromised, shared, or poorly controlled.
Executive priority
Prioritize remediation for internet-facing or business-critical TYPO3 sites, especially where many users hold admin privileges. The privilege requirement lowers urgency versus unauthenticated bugs, but compromised admin accounts could turn this into broad system impact.
Technical view
CVE-2019-19848 affects TYPO3 before 8.7.30, 9.x before 9.5.12, and 10.x before 10.2.2. The flaw is directory traversal in extraction of manually uploaded Extension Manager ZIP archives. The source bundle states admin privileges are required, with System Maintainer privileges also required in v9 LTS and later.
Likely exposure
Exposure is limited to TYPO3 installations running vulnerable versions where privileged backend users can manually upload extension ZIP archives. Internet-facing admin portals, weak admin controls, or compromised maintainer accounts increase practical risk.
Exploitation context
The bundle does not show CISA KEV status or other evidence of active exploitation. Exploitation requires privileged access and user interaction with a manually uploaded ZIP archive, so this is most relevant after account compromise or insider misuse.
Researcher notes
The source describes directory traversal during ZIP extraction but does not provide exact paths, payload mechanics, or post-extraction behavior. Treat impact as potentially serious because the CVSS vector rates confidentiality, integrity, and availability impacts as high, while privilege requirements remain the key limiting factor.
Mitigation direction
- Upgrade TYPO3 to 8.7.30, 9.5.12, 10.2.2, or later supported releases.
- Review the TYPO3 security advisory for version-specific guidance.
- Restrict Extension Manager upload access to trusted administrators only.
- Limit System Maintainer privileges on TYPO3 v9 LTS and later.
- Avoid manual ZIP extension uploads until vulnerable systems are upgraded.
- Review recent extension uploads and unexpected filesystem changes.
Validation and detection
- Inventory TYPO3 versions and compare against the fixed release thresholds.
- Confirm which backend users have admin and System Maintainer privileges.
- Check whether Extension Manager manual ZIP uploads are enabled or used.
- Review logs for recent extension uploads by privileged users.
- Inspect web roots and extension directories for unexpected files.
- Verify upgraded environments report fixed TYPO3 versions.
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
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File access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2019-19848 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AC:L/AV:N/A:H/C:H/I:H/PR:H/S:U/UI:R
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AC:L/AV:N/A:H/C:H/I:H/PR:H/S:U/UI:R0.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
6.8MediumVector: CVSS:3.0/AC:L/AV:N/A:H/C:H/I:H/PR:H/S:U/UI:R
Source materials
- CVE List V5 sourceCVE List V5
- https://typo3.org/security/advisory/typo3-core-sa-2019-024/CVE reference · x_refsource_MISC
- https://review.typo3.org/q/%2522Resolves:+%252388764%2522+topic:securityCVE reference · x_refsource_MISC
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.