MEDIUM

CVE-2021-21087

CVSS v3

5.4

MEDIUM

EPSS Score

37.1 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2021-21087 yet.

Full record on 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.

Technical details

Published: 2021-04-15

Frequently asked questions

What is CVE-2021-21087?

Is CVE-2021-21087 actively exploited?

Active exploitation of CVE-2021-21087 has not been confirmed. Its EPSS score was 37.1% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-21087?

CVE-2021-21087 has a CVSS v3 base score of 5.4 (MEDIUM severity).

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