Vulnerability · Published Nov 14, 2023 · Assigned by mitre
CVE-2023-45878
Critical 9.8
In plain English
A critical-severity out-of-bounds write in the affected software. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 63.4% (higher than 99.2% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei, public proof-of-concept code.
Official 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).
Affected products (as reported)
Weakness: CWE-787