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.

Data from the CrowdSec community indicates that exploitation of CVE-2021-26292 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. Additionally, according to week-over-week analysis by CrowdSec, exploitation of CVE-2021-26292 is surging. Attack volumes are spiking well above historical norms, indicating widespread and escalating interest from threat actors. CVE-2021-26292 is currently experiencing high visibility and active exploitation across the internet.

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.