CVE-2021-26642

When uploading an image file to a bulletin board developed with XpressEngine, a vulnerability in which an arbitrary file can be uploaded due to insufficient verification of the file. A remote attacker can use this vulnerability to execute arbitrary code on the server where the bulletin board is running.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

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

References

Link	Resource
https://boho.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=67125	Third Party Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:a:xpressengine:xpressengine:*:*:*:*:*:*:*:*

cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*

History

02 Feb 2023, 17:09

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 9.8
First Time		Xpressengine xpressengine Microsoft windows Microsoft Xpressengine
CPE		cpe:2.3:a:xpressengine:xpressengine:::::::: cpe:2.3:o:microsoft:windows:-:::::::*
CWE		CWE-434
References	~~(MISC) https://boho.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=67125 -~~	(MISC) https://boho.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=67125 - Third Party Advisory

20 Jan 2023, 17:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2023-01-20 17:15

Updated : 2023-12-10 14:48

NVD link : CVE-2021-26642

Mitre link : CVE-2021-26642

CVE.ORG link : CVE-2021-26642

JSON object : View

Products Affected

microsoft

windows

xpressengine

xpressengine

CWE

CWE-434

Unrestricted Upload of File with Dangerous Type

{"id": "CVE-2021-26642", "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"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}, {"type": "Secondary", "source": "vuln@krcert.or.kr", "cvssData": {"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}]}, "published": "2023-01-20T17:15:10.300", "references": [{"url": "https://boho.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=67125", "tags": ["Third Party Advisory"], "source": "vuln@krcert.or.kr"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-434"}]}, {"type": "Secondary", "source": "vuln@krcert.or.kr", "description": [{"lang": "en", "value": "CWE-434"}]}], "descriptions": [{"lang": "en", "value": "When uploading an image file to a bulletin board developed with XpressEngine, a vulnerability in which an arbitrary file can be uploaded due to insufficient verification of the file. A remote attacker can use this vulnerability to execute arbitrary code on the server where the bulletin board is running."}], "lastModified": "2023-02-02T17:09:58.240", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:xpressengine:xpressengine:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F7B83BE4-8720-4FAE-BBD5-C2C2F5BC0F1E", "versionEndExcluding": "3.0.14"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "vuln@krcert.or.kr"}