CVE-2021-21307

highpriority · act · 80OT risk · criticalEPSS 0.892 · 100 %ileexploit · weaponizedEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · weaponized

Likely / severe?

89.2% (100th) EPSS

CVSS 7.5 · high

Is it mine?

6 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-25

Lucee Server is a dynamic, Java based (JSR-223), tag and scripting language used for rapid web application development. In Lucee Admin before versions 5.3.7.47, 5.3.6.68 or 5.3.5.96 there is an unauthenticated remote code exploit. This is fixed in versions 5.3.7.47, 5.3.6.68 or 5.3.5.96. As a workaround, one can block access to the Lucee Administrator.

cvss

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

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:Nsecondary · ENISA EU

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:Nsecondary · security-advisories@github.comexploitability 3.9 · impact 4

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-862US

exploits (1)

Public proof-of-concept and weaponised exploit code.

exploit/linux/http/lucee_admin_imgprocess_file_writeLucee Administrator imgProcess.cfm Arbitrary File Writeweaponized · metasploit

affected products (6)

Products and version ranges known to be affected.

lucee Lucee5.3.5.0, → 5.3.5.96enisa_euvdEU
lucee Lucee5.3.6.0, → 5.3.6.68enisa_euvdEU
lucee Lucee5.3.7.0, → 5.3.7.47enisa_euvdEU
lucee lucee server5.3.5.00 → 5.3.5.96nvdUScpe:2.3:a:lucee:lucee_server:*:*:*:*:*:*:*:*
lucee lucee server5.3.6.00 → 5.3.6.68nvdUScpe:2.3:a:lucee:lucee_server:*:*:*:*:*:*:*:*
lucee lucee server5.3.7.00 → 5.3.7.47nvdUScpe:2.3:a:lucee:lucee_server:*:*:*:*:*:*:*:*

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2021-02-11modified 2026-06-17

references (21)

External citations — patches, advisories, analysis.

scry

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