CVE-2026-52838: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in alextselegidis easyappointments
Easy!Appointments versions prior to 1.6.0 contain a stored cross-site scripting (XSS) vulnerability. An authenticated administrator can inject malicious HTML or JavaScript into the 'booking disabled' message, which is then rendered without sanitization on the public booking page. This allows stored XSS to be triggered in unauthenticated visitors when the booking page is accessed. The issue is fixed in version 1.6.0.
AI Analysis
Technical Summary
Easy!Appointments is vulnerable to a stored cross-site scripting (CWE-79) issue in versions before 1.6.0. The vulnerability arises because the 'disable_booking_message' setting, which can be defined by an authenticated administrator via a rich-text editor, is not properly escaped or sanitized before being displayed on the public booking page. When disabled-booking mode is enabled, this allows stored XSS payloads to execute in the browsers of unauthenticated visitors. Version 1.6.0 addresses this vulnerability by fixing the input handling.
Potential Impact
The vulnerability allows an authenticated administrator to inject malicious scripts that execute in the browsers of unauthenticated visitors to the public booking page. This can lead to low-impact consequences such as limited script execution in visitor browsers. The CVSS score is low (2.6), reflecting the requirement for administrator privileges and the limited impact on confidentiality and availability.
Mitigation Recommendations
Upgrade to Easy!Appointments version 1.6.0 or later, where this vulnerability is fixed. Since no official patch or workaround is detailed beyond the version upgrade, applying this update is the recommended remediation. There is no indication that the vulnerability is mitigated by configuration changes or other temporary fixes.
CVE-2026-52838: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in alextselegidis easyappointments
Description
Easy!Appointments versions prior to 1.6.0 contain a stored cross-site scripting (XSS) vulnerability. An authenticated administrator can inject malicious HTML or JavaScript into the 'booking disabled' message, which is then rendered without sanitization on the public booking page. This allows stored XSS to be triggered in unauthenticated visitors when the booking page is accessed. The issue is fixed in version 1.6.0.
CVSS v3.1
Score 2.6low
Affected software
pkg:github/alextselegidis/easyappointmentsRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Easy!Appointments is vulnerable to a stored cross-site scripting (CWE-79) issue in versions before 1.6.0. The vulnerability arises because the 'disable_booking_message' setting, which can be defined by an authenticated administrator via a rich-text editor, is not properly escaped or sanitized before being displayed on the public booking page. When disabled-booking mode is enabled, this allows stored XSS payloads to execute in the browsers of unauthenticated visitors. Version 1.6.0 addresses this vulnerability by fixing the input handling.
Potential Impact
The vulnerability allows an authenticated administrator to inject malicious scripts that execute in the browsers of unauthenticated visitors to the public booking page. This can lead to low-impact consequences such as limited script execution in visitor browsers. The CVSS score is low (2.6), reflecting the requirement for administrator privileges and the limited impact on confidentiality and availability.
Mitigation Recommendations
Upgrade to Easy!Appointments version 1.6.0 or later, where this vulnerability is fixed. Since no official patch or workaround is detailed beyond the version upgrade, applying this update is the recommended remediation. There is no indication that the vulnerability is mitigated by configuration changes or other temporary fixes.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-08T18:41:27.724Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a565a3b68715ace43c7b620
Added to database: 07/14/2026, 15:48:11 UTC
Last enriched: 07/30/2026, 07:20:14 UTC
Last updated: 08/28/2026, 10:52:09 UTC
Views: 56
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.