CVE-2026-48083 open-reception CVE debrief

Who should care

Operators of OpenReception's appointment booking software should prioritize patching to prevent log injection attacks. Security teams should monitor logs for suspicious activity and implement SIEM alerting rules to detect potential attacks. Affected operators should review compensating controls for exposed systems while remediation is scheduled and verified. Vulnerability management teams should track exceptions, retest remediated assets, and close the item only after evidence is documented.

Technical summary

The /api/log endpoint in OpenReception's appointment booking software prior to version 1.0.2 accepts unauthenticated POST requests and writes attacker-controlled content directly into the application's stdout log. This allows for log injection attacks, which can be used to forge log lines that look like legitimate system events, mask attacker activity, or pollute SIEM alerting rules with crafted false positives. The vulnerability has a CVSS score of 6.5 and a severity of MEDIUM. The affected product is OpenReception's appointment booking software prior to version 1.0.2.

Defensive priority

Operators should prioritize patching OpenReception's appointment booking software to prevent log injection attacks.

Recommended defensive actions

• Patch OpenReception's appointment booking software to version 1.0.2 or later
• Implement authentication and authorization for the /api/log endpoint
• Validate and sanitize user input to prevent log injection attacks
• Monitor logs for suspicious activity and implement SIEM alerting rules
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record indicates that OpenReception's appointment booking software has a log injection vulnerability prior to version 1.0.2. The /api/log endpoint accepts unauthenticated POST requests and writes attacker-controlled content directly into the application's stdout log. This allows for log injection attacks, which can be used to forge log lines that look like legitimate system events, mask attacker activity, or pollute SIEM alerting rules with crafted false positives. The vulnerability has a CVSS score of 6.5 and a severity of MEDIUM. There is no information on known or unknown affected scope, but defenders should verify the affected product deployments and review compensating controls.

Official resources