W (vincent-peugnet/wcms) through 3.18.0 contains a remote code execution vulnerability that allows authenticated editors to write arbitrary files by abusing the unvalidated path in POST /api/v0/media/upload/[*:path]. Attackers can upload .php files executed by the web server, use encoded ../ sequences to write outside the media directory, and delete arbitrary files via DELETE /api/v0/media/[*:path].

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
vincent-peugnet wcms unaffected
Version Status Constraints
0 affected ≤ 3.18.0

No data.

No data.

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Project Subscriptions

Vendors Products
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Wcms Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/vincent-peugnet/wcms cve-icon cve-icon
https://github.com/vincent-peugnet/wcms/blob/cda5bcdb95dbdb1e804fdfe0e5fd2e2b2f8a90e2/app/class/Controllerapimedia.php#L24-L44 cve-icon cve-icon
https://github.com/vincent-peugnet/wcms/blob/cda5bcdb95dbdb1e804fdfe0e5fd2e2b2f8a90e2/app/class/Media.php#L98 cve-icon cve-icon
https://github.com/vincent-peugnet/wcms/issues/662 cve-icon cve-icon
https://www.vulncheck.com/advisories/w-wcms-through-3.18.0-rce-and-arbitrary-file-write-via-media-upload-api cve-icon cve-icon
History

Sat, 03 Oct 2026 23:30:00 +0000

Type Values Removed Values Added
Description W (vincent-peugnet/wcms) through 3.18.0 contains a remote code execution vulnerability that allows authenticated editors to write arbitrary files by abusing the unvalidated path in POST /api/v0/media/upload/[*:path]. Attackers can upload .php files executed by the web server, use encoded ../ sequences to write outside the media directory, and delete arbitrary files via DELETE /api/v0/media/[*:path].
Title W (wcms) through 3.18.0 RCE and Arbitrary File Write via Media Upload API
First Time appeared Wcms
Wcms wcms
Weaknesses CWE-434
CPEs cpe:2.3:a:wcms:wcms:*:*:*:*:*:*:*:*
Vendors & Products Wcms
Wcms wcms
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-03T22:30:12.394Z

Reserved: 2026-10-03T12:05:26.755Z

Link: CVE-2026-105123

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-04T00:16:35.703

Modified: 2026-10-04T00:16:35.703

Link: CVE-2026-105123

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-04T00:30:05Z

Weaknesses