CVE-2025-54250: Adobe Experience Manager Auth Bypass Flaw

CVE-2025-54250 Overview

Adobe Experience Manager (AEM) versions 6.5.23.0 and earlier contain an Improper Input Validation vulnerability [CWE-20] that enables a security feature bypass. A high-privileged attacker can leverage the flaw over the network to bypass integrity controls and gain unauthorized write access to protected resources.

The vulnerability affects both on-premises AEM 6.5 LTS deployments and AEM Cloud Service tenants. Adobe published fixes in Security Advisory APSB25-90. No public proof-of-concept or in-the-wild exploitation has been reported.

Critical Impact
An authenticated administrator or high-privileged operator can bypass input validation controls to modify protected content or configuration in AEM, undermining integrity of the content management system.

Affected Products

Adobe Experience Manager 6.5.23.0 and earlier (on-premises)
Adobe Experience Manager 6.5 LTS (including SP1)
Adobe Experience Manager Cloud Service (AEM as a Cloud Service)

Discovery Timeline

2025-09-09 - CVE-2025-54250 published to the National Vulnerability Database
2025-09-09 - Adobe releases Security Advisory APSB25-90 with patched builds
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-54250

Vulnerability Analysis

The flaw resides in Adobe Experience Manager's handling of untrusted input across one or more authenticated endpoints. AEM fails to fully validate request parameters before applying them to server-side logic that enforces access or integrity controls.

Because validation is incomplete, an authenticated attacker with high privileges can submit crafted input that causes AEM to skip a security check. The result is unauthorized write access to resources that should be protected against modification. Confidentiality and availability are not directly affected, but integrity is impacted.

The vulnerability is exploitable over the network against exposed AEM Author or Publish instances. No user interaction is required, and attack complexity is low once the attacker holds the required privilege level.

Root Cause

The root cause is classified as Improper Input Validation [CWE-20]. Adobe's advisory categorizes the outcome as a security feature bypass, meaning validation logic that gates a protected operation can be circumvented through crafted input rather than through an authentication or authorization flaw.

The underlying validation gap allows values that should be rejected to pass through into a code path that performs a privileged write. Adobe has not disclosed the specific component or parameter to limit exploitation risk.

Attack Vector

Exploitation requires a valid, high-privileged AEM account. The attacker sends a crafted HTTP request to a vulnerable endpoint on the AEM instance. The request payload contains input that evades server-side validation and triggers an unauthorized write operation.

Because the attack occurs from an authenticated administrative context, exploitation is most relevant in scenarios involving insider misuse, credential compromise, or account takeover of AEM administrators, content authors, or service accounts with elevated roles.

No public exploit code or proof-of-concept has been published. Adobe has not reported observed exploitation in the wild, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. Refer to the Adobe Security Advisory APSB25-90 for vendor-supplied technical context.

Detection Methods for CVE-2025-54250

Indicators of Compromise

Unexpected writes or configuration changes in AEM repositories originating from administrative accounts outside normal maintenance windows.
HTTP requests to AEM Author or Publish endpoints containing malformed or unusually structured parameters from high-privileged sessions.
New or modified JCR nodes, OSGi configurations, or replication agents that do not correlate with a known change ticket.

Detection Strategies

Enable and centralize AEM access logs, request logs, and audit logs, then baseline write activity per administrative user to surface anomalies.
Correlate authentication events for AEM admin accounts with subsequent write operations to detect suspicious session behavior.
Alert on modifications to sensitive paths such as /apps, /libs, /etc, and OSGi configuration nodes when performed by non-deployment accounts.

Monitoring Recommendations

Forward AEM logs into a SIEM or data lake for retention and correlation with identity telemetry.
Monitor for privilege escalation, new admin account creation, and role changes in the AEM user management console.
Track patch level of every AEM instance and alert when any node reports a version at or below 6.5.23.0.

How to Mitigate CVE-2025-54250

Immediate Actions Required

Inventory all AEM instances and identify any running version 6.5.23.0 or earlier, including LTS and Cloud Service tenants.
Apply the fixed builds referenced in Adobe Security Advisory APSB25-90 as soon as change control permits.
Rotate credentials for all high-privileged AEM accounts and review recent administrative activity for anomalies.

Patch Information

Adobe addressed CVE-2025-54250 in the September 2025 security release documented in Adobe Security Advisory APSB25-90. AEM 6.5 customers should upgrade to Service Pack 24 or later, and AEM Cloud Service tenants receive the fix through Adobe's managed release channel.

Workarounds

Restrict network access to AEM Author instances to trusted management networks or a VPN.
Enforce least privilege by reducing the number of accounts holding administrator or jcr:all permissions.
Require multi-factor authentication for all AEM administrative accounts and integrated identity providers to reduce credential-theft risk.

bash

# Configuration example: restrict AEM Author to internal networks via reverse proxy ACL
# (nginx example - adapt to your environment)
location / {
    allow 10.0.0.0/8;      # internal admin network
    deny  all;
    proxy_pass http://aem-author-backend:4502;
}