CVE-2018-12895

WordPress through 4.9.6 allows Author users to execute arbitrary code by leveraging directory traversal in the wp-admin/post.php thumb parameter, which is passed to the PHP unlink function and can delete the wp-config.php file. This is related to missing filename validation in the wp-includes/post.php wp_delete_attachment function. The attacker must have capabilities for files and posts that are normally available only to the Author, Editor, and Administrator roles. The attack methodology is to delete wp-config.php and then launch a new installation process to increase the attacker's privileges.

CVSS v3.0 8.8 HIGH
CVSS v2.0 6.5 MEDIUM

8.8^/10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.5^/10

CVSS v2.0 : MEDIUM

V2 Legend

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

Exploitability : 8.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://blog.ripstech.com/2018/wordpress-file-delete-to-code-execution/	Third Party Advisory
http://www.securityfocus.com/bid/104569	Third Party Advisory VDB Entry
https://wpvulndb.com/vulnerabilities/9100	Third Party Advisory
https://www.debian.org/security/2018/dsa-4250	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00046.html	Mailing List Third Party Advisory
http://packetstormsecurity.com/files/164633/WordPress-4.9.6-Arbitrary-File-Deletion.html	Exploit Third Party Advisory VDB Entry

Configurations

Configuration 1 (hide)

cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:debian:debian_linux:9.0:::::::*
	cpe:2.3:o:debian:debian_linux:8.0:::::::*

Information

Published : 2018-06-26 13:29

Updated : 2021-11-05 11:42

NVD link : CVE-2018-12895

Mitre link : CVE-2018-12895

JSON object : View

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Products Affected

debian

debian_linux

wordpress

wordpress

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://blog.ripstech.com/2018/wordpress-file-delete-to-code-execution/", "name": "https://blog.ripstech.com/2018/wordpress-file-delete-to-code-execution/", "tags": ["Third Party Advisory"], "refsource": "MISC"}, {"url": "http://www.securityfocus.com/bid/104569", "name": "104569", "tags": ["Third Party Advisory", "VDB Entry"], "refsource": "BID"}, {"url": "https://wpvulndb.com/vulnerabilities/9100", "name": "https://wpvulndb.com/vulnerabilities/9100", "tags": ["Third Party Advisory"], "refsource": "MISC"}, {"url": "https://www.debian.org/security/2018/dsa-4250", "name": "DSA-4250", "tags": ["Third Party Advisory"], "refsource": "DEBIAN"}, {"url": "https://lists.debian.org/debian-lts-announce/2018/07/msg00046.html", "name": "[debian-lts-announce] 20180730 [SECURITY] [DLA 1452-1] wordpress security update", "tags": ["Mailing List", "Third Party Advisory"], "refsource": "MLIST"}, {"url": "http://packetstormsecurity.com/files/164633/WordPress-4.9.6-Arbitrary-File-Deletion.html", "name": "http://packetstormsecurity.com/files/164633/WordPress-4.9.6-Arbitrary-File-Deletion.html", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "WordPress through 4.9.6 allows Author users to execute arbitrary code by leveraging directory traversal in the wp-admin/post.php thumb parameter, which is passed to the PHP unlink function and can delete the wp-config.php file. This is related to missing filename validation in the wp-includes/post.php wp_delete_attachment function. The attacker must have capabilities for files and posts that are normally available only to the Author, Editor, and Administrator roles. The attack methodology is to delete wp-config.php and then launch a new installation process to increase the attacker's privileges."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-22"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2018-12895", "ASSIGNER": "cve@mitre.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 6.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P", "authentication": "SINGLE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "severity": "MEDIUM", "impactScore": 6.4, "obtainAllPrivilege": false, "exploitabilityScore": 8.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}}, "publishedDate": "2018-06-26T20:29Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "4.9.7"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2021-11-05T18:42Z"}

8.8 /10