Home/CVE/An issue was discovered in Craft CMS before 3.6.0. In some circumstances, a potential XSS vulnerability existed in conne
CVE

CVE-2021-27902

An issue was discovered in Craft CMS before 3.6.0. In some circumstances, a potential XSS vulnerability existed in conne

An issue was discovered in Craft CMS before 3.6.0. In some circumstances, a potential XSS vulnerability existed in connection with front-end forms that accepted user uploads.

MEDIUM · CVSS 6.1 EPSS 0.00419
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
▤

Affected Products & Versions

1
craftcms craft cms< 3.6.0
▣

Scoring & Timeline

6.1
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD30 Jun 2021 · 12:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/craftcms/cms/blob/develop/CHANGELOG.md#360---2021-01-26Release NotesThird Party Advisory
https://github.com/craftcms/cms/blob/develop/CHANGELOG.md#security-1Release NotesThird Party Advisory
https://github.com/craftcms/cms/commit/8ee85a8f03c143fa2420e7d6f311d95cae3b19cePatchThird Party Advisory
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