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. Data from the CrowdSec community also indicates a gradual decrease in attacks targeting CVE-2021-26292. While still present in the wild, exploitation levels have dropped noticeably week-over-week. This may signal that the vulnerability is becoming less relevant or that defenses are improving fast enough for attackers to lose interest.

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.