CVE-2021-21087

lowpriority · track · 35EPSS 0.371 · 99 %ileEURUUS

grimoire priorityP1 · Urgent

Exploitable?

—

no known exploitation

Likely / severe?

37.1% (99th) EPSS

CVSS 3.5 · low

Is it mine?

10 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

8.0

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 3.5–8

v2.03.5lowAV:N/AC:M/Au:S/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 6.8 · impact 2.9

v3.15.4mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 2.3 · impact 2.7

v3.05.4mediumCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:Nsecondary · ENISA EU

v3.05.4mediumCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:Nsecondary · psirt@adobe.comexploitability 2.3 · impact 2.7

v3.18highAV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.15.4mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79USCWE-79US

affected products (10)

Products and version ranges known to be affected.

Adobe ColdFusion≤ unspecified ≤2016.16enisa_euvdEU
Adobe ColdFusion≤ unspecified ≤2018.10enisa_euvdEU
Adobe ColdFusion≤ unspecified ≤Noneenisa_euvdEU
Adobe ColdFusion≤ unspecified ≤2021.0.0.323925enisa_euvdEU
Adobe Systems Inc. ColdFusion≤ 2021 Update 1fstec_bduRU
Adobe Systems Inc. ColdFusion≤ 2018 Update 11fstec_bduRU
Adobe Systems Inc. ColdFusion≤ 2016 Update 17fstec_bduRU
adobe coldfusion= 2016nvdUScpe:2.3:a:adobe:coldfusion:*:*:*:*:*:*:*:*
adobe coldfusion= 2018nvdUScpe:2.3:a:adobe:coldfusion:*:*:*:*:*:*:*:*
adobe coldfusion= 2021.0.0.323925nvdUScpe:2.3:a:adobe:coldfusion:*:*:*:*:*:*:*:*

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2021-04-15modified 2026-06-17

references (5)

External citations — patches, advisories, analysis.

scry

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