Platform
java
Component
aem-forms
Fixed in
6.5.6
6.4.9
CVE-2020-9741 describes a stored Cross-Site Scripting (XSS) vulnerability within Adobe AEM Forms. This vulnerability allows authenticated users with 'Author' privileges to inject malicious scripts into fields associated with the Forms component. Successful exploitation can lead to the execution of arbitrary JavaScript code in the context of a victim's browser, potentially resulting in session hijacking, data theft, or defacement. The vulnerability impacts AEM Forms versions 6.5.5.0 and below, as well as 6.4.8.2 and below; Adobe recommends upgrading to a patched version.
The impact of CVE-2020-9741 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, allowing them to impersonate legitimate users and gain unauthorized access to sensitive data. They could also inject malicious code to redirect users to phishing sites, display deceptive content, or modify the appearance of the application. The 'Author' privilege requirement limits the immediate attack surface, but this role is often granted to a large number of users within organizations, expanding the potential blast radius. This vulnerability shares similarities with other XSS attacks, where malicious scripts are injected into trusted websites to compromise user accounts and data.
CVE-2020-9741 was publicly disclosed on September 10, 2020. There is no indication of active exploitation campaigns targeting this vulnerability at the time of writing. The vulnerability is not currently listed on the CISA KEV catalog. Public proof-of-concept (PoC) code is available, indicating that the vulnerability is relatively easy to exploit. The CVSS score of 9.0 (CRITICAL) reflects the high potential impact and ease of exploitation.
Exploit Status
EPSS
0.48% (65% percentile)
CVSS Vector
The primary mitigation for CVE-2020-9741 is to upgrade to a patched version of Adobe AEM Forms. Adobe has released updates to address this vulnerability; consult the official Adobe security advisory for specific version details. If immediate upgrading is not possible, consider implementing strict input validation and output encoding on all user-supplied data within the Forms component. Web Application Firewalls (WAFs) configured to detect and block XSS payloads can also provide a layer of defense. Regularly review user permissions and ensure that the 'Author' role is only granted to users who require it. After upgrading, confirm the fix by attempting to inject a simple XSS payload into a Forms field and verifying that it is properly sanitized and does not execute.
Update AEM Forms to a version later than 6.5.5.0 or 6.4.8.1, as appropriate, to mitigate the stored XSS vulnerability. Refer to the Adobe security bulletin for more details and specific upgrade instructions.
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CVE-2020-9741 is a critical stored XSS vulnerability in Adobe AEM Forms versions 6.5.5.0 and below, and 6.4.8.2 and below. It allows attackers with 'Author' privileges to inject malicious scripts.
If you are using Adobe AEM Forms versions 6.5.5.0 or below, or 6.4.8.2 or below, you are potentially affected by this vulnerability. Check Adobe's security advisory for details.
The recommended fix is to upgrade to a patched version of Adobe AEM Forms. Consult the official Adobe security advisory for specific version details and upgrade instructions.
While there's no confirmed active exploitation, the availability of public PoC code suggests a potential risk. Proactive mitigation is recommended.
You can find the official Adobe security advisory for CVE-2020-9741 on the Adobe Security Bulletin website: https://www.adobe.com/security/cve/CVE-2020-9741.html
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