Plainpad: Privilege Escalation via Writable Admin Field in Profile Update (Access Control)
Priority LOW 38CWE-269Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Privilege escalation
- Confidentiality · integrity · availability
- High · High · Low
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-269.
Summary
Plainpad is a self hosted note taking app. Prior to version 1.1.1, Plainpad allows a low-privilege authenticated user to self-escalate to administrator by submitting admin=true in PUT /api.php/v1/users/{id}. The endpoint directly persists the admin attribute from user input, and the escalated account can immediately access admin-only routes. This issue has been patched in version 1.1.1.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00261 17th percentileScored 2026-11-07
Fix Fixed plainpad (alextselegidis): 1.1.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| alextselegidis | plainpad | before 1.1.1 | 1.1.1 | Patch available | CNA |
- plainpad Vendoralextselegidis Affected before 1.1.1 Fixed in 1.1.1 Patch available CNA
Remediation
- Fix · CNA plainpad (alextselegidis) Fixed in 1.1.1
Timeline
- 2026-10-02 Threatist record created from CVE-2026-42562
References
More alextselegidis vulnerabilities
- TI-2023-01200 Use of Hard-coded Credentials in alextselegidis/easyappointments CVSS 3.1CRITICAL 9.8
- TI-2026-70736 Easy!Appointments authorization bypass lets attackers modify bookings CVSS 4.0HIGH 8.8
- TI-2024-37956 An issue in Alex Tselegidis EasyAppointments v.1.5.0 allows a remote attacker to escalate… CVSS 3.1CRITICAL 9.8
- TI-2026-19023 CSRF Protection Bypass: Sensitive endpoints accept GET requests, enabling admin account takeover CVSS 4.0HIGH 7.4
- TI-2025-32119 alextselegidis Easy!Appointments v1.5.1 was discovered to contain a SQL injection… CVSS 3.1HIGH 8.1
- TI-2023-01980 Session Fixation in alextselegidis/easyappointments CVSS 3.1HIGH 8.8
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences