CVE-2026-33934
IDOR in OpenEMR Patient Portal 'show-signature.php' before 8.0.0.3. Authenticated patients can retrieve staff member signature images by supplying arbitrary user values in the POST body.
Executive Summary
CVE-2026-33934 is a medium severity vulnerability affecting appsec. It is classified as CWE-639. Ensure your systems and dependencies are patched immediately to mitigate exposure risks.
Precogs AI Insight
"Precogs AI maps educational vulnerabilities to their root CWE weakness patterns, enabling developers to understand the fundamental code-level causes and prevent entire classes of vulnerabilities."
📚 CVE-2026-33934: IDOR in OpenEMR Patient Portal 'show-signature.php' before 8.0.0.3. Authenticated patients can retrieve staff member signature images by supplying arbitrary user values in the POST body.
This vulnerability, identified as CVE-2026-33934, represents a significant security risk for organizations utilizing the affected software. Precogs AI analysis highlights the recurring pattern of CWE-639 weaknesses in complex application ecosystems.
Risk Assessment
| Metric | Value |
|---|---|
| CVSS Base Score | 4.3 (MEDIUM) |
| Category | 📚 Educational — Foundational Learning |
| Primary CWE | CWE-639 |
| Source | NVD |
Precogs AI Analysis
Precogs AI maps educational vulnerabilities to their root CWE weakness patterns, enabling developers to understand the fundamental code-level causes and prevent entire classes of vulnerabilities.
The pattern observed in CVE-2026-33934 illustrates the critical importance of robust input validation and authorization checks. For instance, the IDOR in OpenEMR Patient Portal 'show-signature demonstrates how small gaps in logic can lead to significant data exposure or system compromise.
Precogs AI recommends a defense-in-depth approach:
- Automated Scanning: Use Precogs AI to identify similar patterns across your codebase.
- Context-Aware Validation: Move beyond simple regex to semantic validation of sensitive parameters.
- Least Privilege: Ensure all endpoints enforce strict authorization checks based on the authenticated user's role.
Remediation & Prevention
Immediate Action
- Patch: Upgrade OpenEMR / SourceCodester / WP Job Portal to the latest verified version that addresses this vulnerability.
- Verify: Audit application logs for any signs of exploitation prior to the patch application.
Future Prevention
- Implement rigorous code review processes focusing on common web vulnerabilities.
- Integrate automated security testing into the CI/CD pipeline.