Security readout for executives and security teams
Plain-English summary
A TYPO3 extension named routes exposed a session identifier in generated HTML when CsrfTokenViewHelper was used. That can disclose sensitive session data to anyone who can view affected page output. The public bundle does not provide CVSS, CWE, or active exploitation evidence.
Executive priority
Prioritize as a targeted information-disclosure issue for TYPO3 sites using this extension. It is not supported by active exploitation evidence in the bundle, but session identifier exposure can create business risk where affected pages are reachable.
Technical view
CVE-2021-36793 affects the routes, also known as Extbase Yaml Routes, TYPO3 extension before 2.1.1. With CsrfTokenViewHelper, a session identifier is unsafely present in HTML output, causing sensitive information disclosure. The provided sources do not describe exploit prerequisites, affected TYPO3 core versions, or detailed remediation beyond the fixed extension boundary.
Likely exposure
Exposure is likely limited to TYPO3 installations using the routes extension before 2.1.1 and using CsrfTokenViewHelper in affected output. The bundle lists vendor and product as n/a, so asset owners should confirm extension presence directly.
Exploitation context
The source bundle does not cite known exploitation, and KEV is false. Risk depends on whether affected pages render session identifiers into HTML and who can access that output. No public exploit status is established by the provided sources.
Researcher notes
Evidence is sparse: no CVSS, CWE, exploit details, or affected TYPO3 core range are provided. Focus research on extension version, CsrfTokenViewHelper usage, page reachability, and whether rendered HTML contained session identifiers before remediation.
Mitigation direction
- Upgrade the routes extension to version 2.1.1 or later.
- Check TYPO3 advisory TYPO3-EXT-SA-2021-008 for vendor guidance.
- Identify templates or pages using CsrfTokenViewHelper with this extension.
- Treat confirmed exposed session identifiers as sensitive incident evidence.
Validation and detection
- Inventory TYPO3 sites for the routes or Extbase Yaml Routes extension.
- Confirm no installed instance is running a version before 2.1.1.
- Review affected rendered HTML for exposed session identifiers.
- Document whether CsrfTokenViewHelper is used on public or authenticated pages.
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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CVE-2021-36793 mapping review
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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/help/security-advisories/securityCVE reference · x_refsource_MISC
- https://typo3.org/security/advisory/typo3-ext-sa-2021-008CVE 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.