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CVE-2021-37334

Published: Aug 25, 2021Updated: Nov 21, 2024 Sources: CVE List NVDNVD-CWE-noinfo
9.8CRITICAL
NVD MITRE
EPSS Score
2.7%
Top 15.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

Umbraco Forms version 4.0.0 up to and including 8.7.5 and below are vulnerable to a security flaw that could lead to a remote code execution attack and/or arbitrary file deletion. A vulnerability occurs because validation of the file extension is performed after the file has been stored in a temporary directory. By default, files are stored within the application directory structure at %BASEDIR%/APP_DATA/TEMP/FileUploads/. Whilst access to this directory is restricted by the root web.config file, it is possible to override this restriction by uploading another specially crafted web.config file to the temporary directory. It is possible to exploit this flaw to upload a malicious script file to execute arbitrary code and system commands on the server.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

NVD-CWE-noinfo

Affected Products

umbraco
commercial·DKaka umbraco cms, umbraco-cms, umbraco forms
formsOn-premCMS Plugin
Web & CMS Plugins / cms-core
and 1 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2021-37334?We can run the check for you — a free external exposure review, no install. Check my exposure

References

https://umbraco.com/blog/security-advisory-security-patches-for-umbraco-forms-ready-on-july-20th-2021-at-7-am-utc/
umbraco.com
https://umbraco.com/blog/security-advisory-20th-of-july-2021-patch-is-now-available/
umbraco.com

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