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Vulnerability record · CVE-2021-21087 · published 15 April 2021

CVE-2021-21087: Adobe coldfusion cross-site scripting vulnerability

Adobe · Coldfusion

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.

5.4 CVSS 3.1 Medium EPSS 37% · top 1.5% CWE-79 · Cross-site scripting
5.4CVSS 3.1 base score, v2 3.5
37%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://helpx.adobe.com/security/products/coldfusion/apsb21-16.html PatchVendor Advisory
https://helpx.adobe.com/security/products/coldfusion/apsb21-16.html PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2026-48282Adobe ColdFusion path traversal leads to remote code executionColdFusion versions 2025.9, 2023.20 and earlier contain a path traversal flaw (CWE-22) that allows an unauthenticated remote attacker to reach files …KEVEPSS 42%analysed9.8CVE-2023-38203Adobe ColdFusion untrusted data deserialization allows remote code executionAdobe ColdFusion 2018u17, 2021u7, and 2023u1 (and earlier) are affected by a deserialization of untrusted data flaw that can lead to arbitrary code e…KEVEPSS 97%analysed9.8CVE-2023-29300Adobe ColdFusion untrusted data deserialization allows code executionAdobe ColdFusion 2018u16 and earlier, 2021u6 and earlier, and 2023.0.0.330468 and earlier deserialize untrusted data, which can lead to arbitrary cod…KEVEPSS 100%analysed9.8CVE-2023-26359Adobe ColdFusion untrusted data deserialization allows code executionAdobe ColdFusion 2018 Update 15 and earlier and 2021 Update 5 and earlier deserialize untrusted data, which can lead to arbitrary code execution in t…KEVEPSS 17%analysed9.8CVE-2018-15961Adobe ColdFusion unrestricted file upload leads to code executionAdobe ColdFusion (July 12 release 2018.0.0.310739, Update 6 and earlier, and Update 14 and earlier) allows unrestricted file uploads. An uploaded fil…KEVEPSS 100%analysed9.8CVE-2018-4939Adobe ColdFusion Deserialization of Untrusted Data Enables Code ExecutionAdobe ColdFusion Update 5 and earlier and ColdFusion 11 Update 13 and earlier contain a deserialization of untrusted data flaw (CWE-502). A remote, u…KEVEPSS 62%analysed9.8CVE-2017-3066Adobe ColdFusion Java deserialization in Apache BlazeDS allows RCEAdobe ColdFusion 2016 Update 3 and earlier, ColdFusion 11 Update 11 and earlier, and ColdFusion 10 Update 22 and earlier contain a Java deserializati…KEVEPSS 91%analysed9.8CVE-2013-0632Adobe ColdFusion RDS default password authentication bypassAdobe ColdFusion 9.0 through 10 ships administrator.cfc with an RDS component that accepts a default empty password. An attacker can log in to RDS wi…KEVEPSS 94%analysed

Source: NIST National Vulnerability Database (record CVE-2021-21087), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.