CVE-2021-25094

The Tatsu WordPress plugin before 3.3.12 add_custom_font action can be used without prior authentication to upload a rogue zip file which is uncompressed under the WordPress's upload directory. By adding a PHP shell with a filename starting with a dot ".", this can bypass extension control implemented in the plugin. Moreover, there is a race condition in the zip extraction process which makes the shell file live long enough on the filesystem to be callable by an attacker.

CVSS v3.0 8.1 HIGH
CVSS v2.0 6.8 MEDIUM

8.1^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://wpscan.com/vulnerability/fb0097a0-5d7b-4e5b-97de-aacafa8fffcd	Exploit Third Party Advisory
https://darkpills.com/wordpress-tatsu-builder-preauth-rce-cve-2021-25094/	Exploit Third Party Advisory
http://packetstormsecurity.com/files/167190/WordPress-Tatsu-Builder-Remote-Code-Execution.html	Exploit Third Party Advisory VDB Entry

Advertisement

Configurations

Configuration 1 (hide)

cpe:2.3:a:brandexponents:tatsu:*:*:*:*:*:wordpress:*:*

Information

Published : 2022-04-25 09:16

Updated : 2022-11-09 13:26

NVD link : CVE-2021-25094

Mitre link : CVE-2021-25094

JSON object : View

CWE

CWE-306

Missing Authentication for Critical Function

Advertisement

Products Affected

brandexponents

tatsu

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://wpscan.com/vulnerability/fb0097a0-5d7b-4e5b-97de-aacafa8fffcd", "name": "https://wpscan.com/vulnerability/fb0097a0-5d7b-4e5b-97de-aacafa8fffcd", "tags": ["Exploit", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://darkpills.com/wordpress-tatsu-builder-preauth-rce-cve-2021-25094/", "name": "https://darkpills.com/wordpress-tatsu-builder-preauth-rce-cve-2021-25094/", "tags": ["Exploit", "Third Party Advisory"], "refsource": "MISC"}, {"url": "http://packetstormsecurity.com/files/167190/WordPress-Tatsu-Builder-Remote-Code-Execution.html", "name": "http://packetstormsecurity.com/files/167190/WordPress-Tatsu-Builder-Remote-Code-Execution.html", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "The Tatsu WordPress plugin before 3.3.12 add_custom_font action can be used without prior authentication to upload a rogue zip file which is uncompressed under the WordPress's upload directory. By adding a PHP shell with a filename starting with a dot \".\", this can bypass extension control implemented in the plugin. Moreover, there is a race condition in the zip extraction process which makes the shell file live long enough on the filesystem to be callable by an attacker."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-306"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-25094", "ASSIGNER": "contact@wpscan.com"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 6.8, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "MEDIUM", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "severity": "MEDIUM", "acInsufInfo": false, "impactScore": 6.4, "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.2}}, "publishedDate": "2022-04-25T16:16Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:brandexponents:tatsu:*:*:*:*:*:wordpress:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "3.3.12"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2022-11-09T21:26Z"}