AfterLogic Aurora and WebMail Pro - Path Traversal (CVE-2021-26293)

CVE-2021-26293, a path traversal vulnerability in AfterLogic Aurora and WebMail Pro through version 8.5.3, when DAV is enabled, allows attackers to create arbitrary files—including executable files—under the web root directory. Exploiting this flaw could enable remote code execution or the deployment of malicious scripts, posing a significant risk to the affected systems.

CrowdSec has been tracking this vulnerability and its exploits since 30th of June 2025.

Based on data from the CrowdSec network, nearly all observed exploitation of CVE-2021-26293 is fully opportunistic, with attackers indiscriminately scanning the entire internet. These attacks are automated and lack any form of target selection or reconnaissance. Telemetry from the CrowdSec network also shows that exploitation activity for CVE-2021-26293 remains steady week-over-week. Attack volumes are consistent with long-term trends, indicating sustained interest from threat actors. CVE-2021-26293 continues to be an active part of the threat landscape and will likely remain this way for the forseeable future.

Attackers exploit this vulnerability by sending POST requests to DAV endpoints, attempting to create files via directory traversal, potentially leading to webshell upload or arbitrary file creation.