CVE-2026-63303 | A Path Traversal vulnerability exists in Quick.CMS through t… | CVSS 5.1 MEDIUM

Description

A Path Traversal vulnerability exists in Quick.CMS through the URI path component of HTTP requests, where the server fails to normalize dot-dot-slash (../) sequences before resolving and serving the requested file. An authenticated attacker with admin privileges can use this vulnerability to read contents of files located in the sibling directory of the webroot via a crafted HTTP request containing ../ sequences in the URI. The vendor assessed the likelihood of exploitation as very low and determined that a fix is not necessary.

Metadata

CVE ID: CVE-2026-63303
State: PUBLISHED
Assigner: CERT-PL
Reserved: 2026-07-16 10:27 UTC
Published: 2026-07-28 10:43 UTC
Last updated: 2026-07-28 12:21 UTC
Primary CWE: CWE-23
CWE-23 Relative path traversal
Vendor / Product: OpenSolution / Quick.CMS
Sources: cve.org · NVD

Severity & Metrics

5.1 MEDIUM CVSS 4.0

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
OpenSolution	Quick.CMS	—	0 ≤ 6.8.0

Weakness (CWE)

CWE	Source	Description
CWE-23	cna	CWE-23 Relative path traversal

CVSS scores (1)

Score	Severity	Version	Source	Vector
5.1	MEDIUM	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N

References (2)