Platform
java
Component
aem-forms-add-on
Fixed in
6.5.6
6.4.9
CVE-2020-9732 represents a critical stored Cross-Site Scripting (XSS) vulnerability within the Adobe Experience Manager (AEM) Forms add-on. This flaw allows authenticated attackers with 'Author' privileges to inject malicious scripts into fields associated with the Sites component. Successful exploitation can lead to the execution of arbitrary JavaScript code within a victim's browser, potentially compromising sensitive data and system integrity. The vulnerability impacts AEM Forms add-on versions 6.5.5.0 and below, as well as 6.4.8.2 and below; Adobe has released patches to address this issue.
The impact of CVE-2020-9732 is significant due to the potential for remote code execution within a user's browser. An attacker could leverage this vulnerability to steal session cookies, redirect users to malicious websites, deface web pages, or even gain control of the user's account. The 'Author' privilege requirement limits the immediate scope, but 'Author' accounts often have broad access within AEM environments, potentially allowing attackers to escalate their privileges and compromise other systems. This vulnerability shares similarities with other XSS exploits where user-supplied data is not properly sanitized before being rendered in a web page, leading to the injection of malicious code. The blast radius extends to any user who views a page containing the injected script.
CVE-2020-9732 was publicly disclosed on September 10, 2020. While no active exploitation campaigns have been definitively linked to this specific CVE, the widespread nature of XSS vulnerabilities and the relatively easy exploitability of this particular flaw make it a potential target for opportunistic attackers. It is not listed on CISA KEV. Public proof-of-concept exploits are available, demonstrating the ease with which this vulnerability can be exploited.
Exploit Status
EPSS
0.70% (72% percentile)
CVSS Vector
The primary mitigation for CVE-2020-9732 is to upgrade to a patched version of the AEM Forms add-on. Adobe has released updates to address this vulnerability; consult the Adobe Security Bulletin for specific version details. If immediate patching is not feasible, consider implementing input validation and output encoding on the Sites component fields to sanitize user-supplied data. Web Application Firewalls (WAFs) configured to detect and block XSS payloads can provide an additional layer of defense. Carefully review AEM user roles and permissions to minimize the number of users with 'Author' privileges. After upgrade, confirm the vulnerability is resolved by attempting to inject a test script into a Sites component field and verifying that it is not executed.
Update the AEM Forms add-on to a version later than 6.5.5.0 or 6.4.8.1, as appropriate, to fix the stored XSS vulnerability. See the Adobe security advisory for more details and specific upgrade instructions.
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CVE-2020-9732 is a critical stored XSS vulnerability in Adobe AEM Forms add-on versions 6.5.5.0 and below, and 6.4.8.2 and below, allowing attackers to inject malicious scripts.
If you are running AEM Forms add-on versions 6.5.5.0 or below, or 6.4.8.2 or below, you are potentially affected by this vulnerability.
Upgrade to a patched version of the AEM Forms add-on as recommended by Adobe. Implement input validation and output encoding as a temporary workaround.
While no confirmed active exploitation campaigns are publicly known, the vulnerability's ease of exploitation makes it a potential target.
Refer to the Adobe Security Bulletin for detailed information and patch availability: https://www.adobe.com/security/advisories/adv20-2739.html
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