Security readout for executives and security teams
Plain-English summary
Kentico Xperience sites using affected MVC form file upload components may let a low-privileged authenticated user upload unsafe file types. That can threaten site content, data confidentiality, and availability. This is not confirmed as actively exploited in the provided sources, but the impact is high for exposed Kentico environments.
Executive priority
Prioritize remediation for internet-facing Kentico Xperience sites or environments with broad authenticated user access. Treat as high priority because a low-privileged account may be enough to create serious business impact.
Technical view
CVE-2019-25229 is CWE-434 unrestricted file upload in Kentico Xperience, described for versions up to 12.0.29. Authenticated users with “Read data” permissions can upload arbitrary file types through MVC form file uploader components and manipulate file names. CVSS 3.1 is 8.8: AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Likely exposure
Most relevant to organizations running Kentico Xperience MVC sites with form file uploader components enabled, especially internet-facing sites with authenticated user access. Exposure depends on deployed version, form configuration, and user permission model.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Exploitation requires authenticated access with low privileges, but no user interaction is required. Successful abuse could allow unauthorized files on the system, with potential confidentiality, integrity, and availability impact.
Researcher notes
Evidence identifies Kentico Xperience up to 12.0.29 and MVC form file uploader components. The source bundle has limited affected-version metadata, so validate exact product build and hotfix status with Kentico guidance. Do not assume exploitation in the wild from these sources alone.
Mitigation direction
- Identify Kentico Xperience instances and confirm deployed versions.
- Review Kentico hotfix guidance and apply the appropriate vendor-supported hotfix.
- Restrict access to MVC form file upload features where not required.
- Review user permissions, especially accounts with “Read data” access.
- Limit allowed upload file types and storage exposure per vendor guidance.
Validation and detection
- Inventory Kentico Xperience MVC sites and form components.
- Check whether versions are at or below 12.0.29.
- Confirm hotfix level against Kentico DevNet hotfix information.
- Audit accounts with access to affected forms and permissions.
- Review file upload locations for unexpected or unauthorized file types.
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.
CWE-434: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupFile 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-2019-25229 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
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- Kentico DevNet HotfixesCVE reference · vendor-advisory, patch
- VulnCheck Advisory: Kentico Xperience <= 12.0.29 MVC Forms Unrestricted File UploadCVE reference · third-party-advisory
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.
Unrestricted Upload of File with Dangerous Type
Unrestricted Upload of File with Dangerous Type represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.