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.
Insights from the CrowdSec network reveal that the attackers trying to exploit CVE-2023-45878 are composed of a fairly even mix of opportunistic and targeted actors. Some attackers employ preliminary reconnaissance, while others use indiscriminate scanning. In addition, according to the CrowdSec network, attack volume against CVE-2023-45878 has dipped slightly compared to the previous week. Although still commonly targeted, the decline suggests a cooling-off period. Long-term relevance remains, but attention is waning.
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 |