CVE-2021-40712 Adobe Experience Manager Path parameter Improper Input Validation Could Lead To DOS
An authenticated attacker can cause server-side denial of service in Adobe Experience Manager by sending a malformed POST request with an invalid path parameter.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-40712?
CVE-2021-40712 is a medium-severity denial of service vulnerability in Adobe Experience Manager, published on 27 Sep 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Adobe Experience Manager version 6.5.9.0 (and earlier) is affected by a improper input validation vulnerability via the path parameter. An authenticated attacker can send a malformed POST request to achieve server-side denial of service.
Weakness: CWE-20
Which versions are affected by CVE-2021-40712?
It affects 1 product.
Products include Adobe Experience Manager.
How do I fix CVE-2021-40712?
No fix has been published for CVE-2021-40712 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-40712 being exploited?
There is no known exploitation of CVE-2021-40712 in the wild and no public exploit code.
Other vulnerabilities in Adobe Experience Manager
- CVE-2026-90532 Adobe Experience Manager | Incorrect Authorization (CWE-863)
- CVE-2026-105895 Adobe Experience Manager | Improper Input Validation (CWE-20)
- CVE-2026-19232 Adobe Experience Manager | Incorrect Authorization (CWE-863)
- CVE-2025-49533 Adobe Experience Manager (MS) | Deserialization of Untrusted Data (CWE-502)
- CVE-2021-40722 AEM Forms Improper Restriction of XML External Entity Reference
Sources
Also known as GHSA-34w9-hwjp-7h9h.