CVE-2025-46852 Overview
Adobe Experience Manager (AEM) versions 6.5.22 and earlier contain a stored Cross-Site Scripting (XSS) vulnerability [CWE-79]. A low-privileged attacker can inject malicious JavaScript into vulnerable form fields. The payload executes in a victim's browser when they visit the page containing the affected field. The flaw impacts both on-premises AEM deployments and AEM Cloud Service instances. Adobe published the fix in security bulletin APSB25-48.
Critical Impact
A low-privileged authenticated attacker can persist malicious JavaScript in AEM form fields, executing arbitrary script in victim browsers with user interaction required.
Affected Products
- Adobe Experience Manager 6.5.22 and earlier (on-premises)
- Adobe Experience Manager Cloud Service
- AEM form components accepting user-controlled input
Discovery Timeline
- 2025-08-20 - CVE-2025-46852 published to the National Vulnerability Database
- 2025-08-20 - Adobe releases security bulletin APSB25-48
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-46852
Vulnerability Analysis
The vulnerability is a stored XSS flaw in Adobe Experience Manager form components. Input submitted to specific form fields is persisted without adequate output encoding or input sanitization. When another user renders the page containing the stored payload, the browser interprets the injected content as executable JavaScript.
Exploitation requires the attacker to hold a low-privileged account on the AEM instance. It also requires a victim to browse to the affected page, which introduces a user interaction dependency. The scope is changed because the script executes in the victim's browser context and can access resources beyond the vulnerable component itself, including session cookies scoped to the AEM origin.
See the Adobe Security Advisory APSB25-48 for vendor-supplied technical details.
Root Cause
The root cause is improper neutralization of input during web page generation, tracked as [CWE-79]. AEM form field handlers accept attacker-controlled markup and store it in the content repository. On rendering, the template writes the stored value into the HTML response without contextual escaping, allowing <script> tags or event handler attributes to execute.
Attack Vector
The attack is delivered over the network against an authenticated AEM session. An attacker with author or contributor-level access submits a crafted payload into a vulnerable form field. Any user, including higher-privileged administrators, who later views the page triggers execution of the injected JavaScript. Consequences include session token theft, forced actions on behalf of the victim, and phishing content served from a trusted AEM origin.
No public proof-of-concept exploit is available at the time of writing, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.
Detection Methods for CVE-2025-46852
Indicators of Compromise
- Unexpected <script>, onerror, onload, or javascript: strings persisted in AEM form field content within the JCR repository
- Outbound HTTP requests from authenticated user browsers to attacker-controlled domains after visiting AEM-authored pages
- Session cookies or CSRF tokens transmitted to external endpoints not owned by the organization
- Author or contributor accounts submitting anomalously large or HTML-heavy payloads to form components
Detection Strategies
- Audit JCR nodes and form field properties for HTML entities, script tags, and event handler attributes using AEM's Query Builder or JCR SQL2 queries
- Deploy a web application firewall rule set that inspects POST bodies to AEM form endpoints for XSS payload signatures
- Correlate content authoring events with subsequent client-side errors or Content Security Policy violation reports
Monitoring Recommendations
- Enable and forward AEM access.log and audit.log entries to a centralized log platform for review of form submissions by low-privileged accounts
- Implement a Content Security Policy in report-only mode to surface unexpected inline script execution on authored pages
- Monitor privileged administrator sessions for anomalous DOM behavior when previewing content authored by lower-privileged users
How to Mitigate CVE-2025-46852
Immediate Actions Required
- Upgrade Adobe Experience Manager on-premises deployments to the fixed release identified in APSB25-48
- Confirm AEM Cloud Service instances are running the patched service pack; Adobe manages cloud updates but tenants should verify
- Review recent form field submissions from low-privileged accounts for suspicious HTML or script content
- Rotate authentication credentials and session tokens for any accounts that viewed potentially compromised pages
Patch Information
Adobe addressed CVE-2025-46852 in the security update described in Adobe Security Advisory APSB25-48. Administrators should apply the vendor-specified service pack for AEM 6.5 and confirm cloud instances have received the corresponding maintenance release.
Workarounds
- Restrict author and contributor privileges to trusted personnel only, reducing the pool of accounts that can submit form field content
- Deploy a strict Content Security Policy that disallows inline scripts and restricts script sources to approved origins
- Configure a WAF or reverse proxy to filter script tags and event handler attributes on submissions to AEM form endpoints until the patch is applied
# Example Content Security Policy header to reduce XSS impact
# Add to AEM dispatcher or reverse proxy configuration
Header always set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'self'"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
