THREATPORT/VULNERABILITY/CVE-2021-21087
MEDIUM SEVERITY

CVE-2021-21087

Coldfusion vulnerability

CVSS
5.4
EPSS
37.1%
EPSS pct
98th
Exploited
No known
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.
Affected vendor
Adobe
Affected product
Coldfusion
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness type (CWE)
  • CWE-79 — Cross-Site Scripting (XSS)
Published
2021-04-15

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring low privileges, user interaction. Successful exploitation leads to low impact to confidentiality, low impact to integrity.

Its EPSS score of 37.1% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2021-21087

  • Confirm whether Adobe Coldfusion is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-21087.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-21087

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-21087 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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