CVE-2026-63303
Last modified
CVE-2026-63303 is a medium-severity vulnerability rated 5.1/10 on the CVSS scale. 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.. EPSS estimates a 0.39% chance of exploitation in the next 30 days.
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.
Metrics
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| OpenSolution | Quick.CMS | <= 6.8.0 |
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-63303?
How severe is CVE-2026-63303?
How do I fix CVE-2026-63303?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-63298An improper neutralization of special elements vulnerability…9.9
- CVE-2026-63299An authorization bypass vulnerability in LXD allows an authe…9.9
- CVE-2026-6330The ML-KEM ARM64 NEON ciphertext comparison only compares ha…6.5
- CVE-2026-63300An improper validation vulnerability in the instancePostMigr…9.9
- CVE-2026-63301In Quick.CMS, the administrative user interface restricts de…7
- CVE-2026-63302Quick.CMS is vulnerable to Local File Inclusion (LFI) in the…5.1
- CVE-2026-63304AVideo through 29.0 contains an OS command injection vulnera…9.2
- CVE-2026-63305AVideo through 29.0 contains an OS command injection vulnera…9.2
- CVE-2026-63306stoatchat before 0.13.5 contains an unauthenticated server-s…9.2
- CVE-2026-63307Chat2DB before 5.3.0 contains an insecure direct object refe…7.1
- CVE-2026-63308Helm through 4.2.3, fixed in commit ba6c9a2, contains a deni…6.5
- CVE-2026-63309SurrealDB before 3.1.5 fail to apply field-level SELECT perm…4.3
Are you affected by CVE-2026-63303?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST