CVE-2021-21084: Adobe Experience Manager

Medium severity, CVSS 6.1. EPSS: 1.8% chance of exploitation in the next 30 days.

AEM's Cloud Service offering, as well as versions 6.5.7.0 (and below), 6.4.8.3 (and below) and 6.3.3.8 (and below) are affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by an attacker to inject malicious scripts into vulnerable form fields. Malicious JavaScript may be executed in a victim’s browser when they browse to the page containing the vulnerable field.

Affected products

• Adobe Experience Manager: up to and including 6.3.3.8; from 6.4.0.0, before 6.4.8.4 (fixed in 6.4.8.4); from 6.5.0.0, before 6.5.8.0 (fixed in 6.5.8.0)
• Adobe Experience Manager Cloud Service: affected versions not specified

Published 2021-06-28. Last modified 2026-06-17.