CVE-2021-21087 Cross-site scripting in ColdFusion
An attacker can execute arbitrary JavaScript in the victim's browser via improper input neutralization in Adobe ColdFusion, requiring user interaction.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-21087?
CVE-2021-21087 is a medium-severity cross-site scripting vulnerability in Adobe Coldfusion, published on 15 Apr 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Adobe Coldfusion versions 2016 (update 16 and earlier), 2018 (update 10 and earlier) and 2021.0.0.323925 are affected by an Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability. An attacker could abuse this vulnerability to execute arbitrary JavaScript code in context of the current user. Exploitation of this issue requires user interaction.
Weakness: CWE-79
Which versions are affected by CVE-2021-21087?
It affects 1 product.
Products include Adobe Coldfusion.
How do I fix CVE-2021-21087?
No fix has been published for CVE-2021-21087 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2021-21087 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-21087 exists.
Public exploit code: 1 Nuclei template.
Other vulnerabilities in Adobe Coldfusion
- CVE-2026-48282 Adobe ColdFusion Path Traversal
- CVE-2023-38203 Adobe ColdFusion Deserialization of Untrusted Data
- CVE-2023-29300 Adobe ColdFusion Deserialization of Untrusted Data
- CVE-2023-26359 Adobe ColdFusion Deserialization of Untrusted Data
- CVE-2018-15961 Adobe ColdFusion Unrestricted File Upload
Sources
Also known as GHSA-9mx8-9vhh-5qr7.