AfterLogic Aurora and WebMail Pro - Information Disclosure (CVE-2021-26292)

CVE-2021-26292 is an Information Disclosure vulnerability affecting AfterLogic Aurora and WebMail Pro. An attacker can exploit this vulnerability in combination with existing default credentials.

CrowdSec has been tracking this vulnerability and its exploits since 2nd of April 2025.

Based on data from the CrowdSec network, nearly all observed exploitation of CVE-2021-26292 is fully opportunistic, with attackers indiscriminately scanning the entire internet. These attacks are automated and lack any form of target selection or reconnaissance. CrowdSec network telemetry also shows that exploitation of CVE-2021-26292 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.

Exploitation targets webdev endpoints with the default credentials caldav_public_user@localhost. The attacker can send an HTTP DELETE request to the WebDAV endpoint to obtain the web root path.