Security readout for executives and security teams
Plain-English summary
This CVE describes a cross-site scripting issue in Kimai2 1.30.0 Markdown rendering that could let an attacker escalate privileges after user interaction. The CVSS score is critical, but the bundle does not show active exploitation or a confirmed fixed release.
Executive priority
Treat as high-priority if Kimai2 1.30.0 is deployed. The severity is critical, but urgency should be based on confirmed exposure because the bundle lacks active exploitation evidence.
Technical view
The record identifies CWE-79 in /src/Twig/Runtime/MarkdownExtension.php for kevinpapst/kimai2 1.30.0. CVSS 3.1 is 9.6 with network attack vector, low complexity, no privileges, required user interaction, changed scope, and high confidentiality, integrity, and availability impact.
Likely exposure
Likely exposure is limited to organizations running Kimai2 1.30.0, especially internet-accessible instances that render Markdown from user-controlled input. The provided affected-product fields are incomplete.
Exploitation context
The source bundle marks KEV as false and provides no evidence of in-the-wild exploitation. The attack requires user interaction according to the CVSS vector, but no exploit details are provided in the sources.
Researcher notes
The record is sparse: affected CPE data is n/a, and the PR reference is not summarized in the bundle. Validate against upstream code history before asserting fixed versions, exploitability details, or exact attack paths.
Mitigation direction
- Inventory Kimai deployments and identify any running version 1.30.0.
- Review vendor repository and PR #962 for confirmed remediation guidance.
- Upgrade only to a vendor-supported fixed release once identified.
- Restrict access to exposed Kimai instances until remediation is complete.
- Review Markdown-rendered fields for untrusted content handling.
Validation and detection
- Confirm whether deployed code includes /src/Twig/Runtime/MarkdownExtension.php.
- Verify running Kimai version against the vulnerable 1.30.0 reference.
- Check change history for PR #962 or related Markdown sanitization fixes.
- Review logs for suspicious content changes or unexpected privilege changes.
- Run approved regression tests for Markdown rendering and privilege boundaries.
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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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 lookupCVE-2020-19825 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
- Critical
- CVSS
- 9.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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:N/UI:R/S:C/C:H/I:H/A:H2.86Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.6CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/kevinpapst/kimai2CVE reference
- https://github.com/kevinpapst/kimai2/pull/962/filesCVE reference
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.