Sitecore - Authentication Bypass (CVE-2025-34509)

Tracked as CVE-2025-34509, this vulnerability affects multiple versions of Sitecore Experience Manager (XM) and Experience Platform (XP). A hardcoded user account is present in the software, allowing unauthenticated remote attackers to gain unauthorized access to the administrative API via HTTP. This critical flaw poses a serious risk to systems by potentially exposing sensitive functions to external threat actors.

CrowdSec has been tracking this vulnerability and its exploits since 20th of June 2025.

According to CrowdSec data, while opportunistic exploitation dominates, a portion of threat actors trying to exploit CVE-2025-34509 apply basic targeting methods such as port or service detection. This indicates emerging patterns of selective targeting. Data from the CrowdSec community also indicates a gradual decrease in attacks targeting CVE-2025-34509. 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.

Observed attack attempts focus on URLs containing /sitecore/api/ssc/auth/login to compromise the admin panel.