GibbonEdu Gibbon - Arbitrary File Upload (CVE-2023-45878)
Description
GibbonEdu Gibbon version 25.0.1 and before allows Arbitrary File Write because rubrics_visualise_saveAjax.phps does not require authentication. The endpoint accepts the img, path, and gibbonPersonID parameters. The img parameter is expected to be a base64 encoded image. If the path parameter is set, the defined path is used as the destination folder, concatenated with the absolute path of the installation directory. The content of the img parameter is base64 decoded and written to the defined file path. This allows creation of PHP files that permit Remote Code Execution (unauthenticated).
psychologyCrowdSec Analysis
CVE-2023-45878 is a critical unauthenticated vulnerability in GibbonEdu Gibbon that permits arbitrary file write, enabling attackers to potentially achieve remote code execution.
CrowdSec has been tracking this vulnerability and its exploits since 20th of May 2025.
Data from the CrowdSec community indicates that exploitation of CVE-2023-45878 is highly selective and intelligence-driven. Threat actors use advanced reconnaissance and carefully choose their targets, often as part of sophisticated campaigns or advanced persistent threat operations. CrowdSec network telemetry also shows that exploitation of CVE-2023-45878 has significantly declined over the past week. Attack volumes are well below the long-term average, suggesting attackers are rapidly losing interest. The vulnerability appears to be falling out of active use across most threat landscapes.
Observed exploitation attempts are focused on URLs containing /modules/rubrics/rubrics_visualise_saveajax.php.
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| Event | Date |
|---|---|
| CVE Published | 2023-11-14 |
| Rule Released | 2025-05-20 |
| CrowdSec First Seen | 2025-05-20 |