Medium severity · published Jul 28, 2026
CVE-2026-63303
Path Traversal in Quick.CMS
5.1
CVSS
0.6%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 47% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
QU
Quick.CMS · OpenSolution
through 6.8.0 · source: vendor
Affected product
QU
Quick.CMS
OpenSolution
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