CVE-2021-24171

The WooCommerce Upload Files WordPress plugin before 59.4 ran a single sanitization pass to remove blocked extensions such as .php. It was possible to bypass this and upload a file with a PHP extension by embedding a "blocked" extension within another "blocked" extension in the "wcuf_file_name" parameter. It was also possible to perform a double extension attack and upload files to a different location via path traversal using the "wcuf_current_upload_session_id" parameter.

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

V2 Legend

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://wpscan.com/vulnerability/ed4288a1-f7e4-455f-b765-5ac343f87194	Third Party Advisory
https://www.wordfence.com/blog/2021/03/critical-vulnerability-patched-in-woocommerce-upload-files/	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:woocommerce:upload_files:*:*:*:*:*:wordpress:*:*

Information

Published : 2021-04-05 12:15

Updated : 2022-10-24 10:15

NVD link : CVE-2021-24171

Mitre link : CVE-2021-24171

JSON object : View

CWE

CWE-434

Unrestricted Upload of File with Dangerous Type

Products Affected

woocommerce

upload_files

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://wpscan.com/vulnerability/ed4288a1-f7e4-455f-b765-5ac343f87194", "name": "https://wpscan.com/vulnerability/ed4288a1-f7e4-455f-b765-5ac343f87194", "tags": ["Third Party Advisory"], "refsource": "CONFIRM"}, {"url": "https://www.wordfence.com/blog/2021/03/critical-vulnerability-patched-in-woocommerce-upload-files/", "name": "https://www.wordfence.com/blog/2021/03/critical-vulnerability-patched-in-woocommerce-upload-files/", "tags": ["Third Party Advisory"], "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "The WooCommerce Upload Files WordPress plugin before 59.4 ran a single sanitization pass to remove blocked extensions such as .php. It was possible to bypass this and upload a file with a PHP extension by embedding a \"blocked\" extension within another \"blocked\" extension in the \"wcuf_file_name\" parameter. It was also possible to perform a double extension attack and upload files to a different location via path traversal using the \"wcuf_current_upload_session_id\" parameter."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-434"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-24171", "ASSIGNER": "contact@wpscan.com"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 7.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "severity": "HIGH", "acInsufInfo": false, "impactScore": 6.4, "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}}, "publishedDate": "2021-04-05T19:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:woocommerce:upload_files:*:*:*:*:*:wordpress:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "59.4"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2022-10-24T17:15Z"}

9.8 /10