TI-2026-45147 Aliases CVE-2026-63301 GHSA-4pmv-mf66-4v3h

Denial of Service in Quick.CMS

LOW 32CWE-602Published 2026-07-28 · Updated 2026-07-28

Key facts

Attack vector: Network
Privileges required: High
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: None · Low · High
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

In Quick.CMS, the administrative user interface restricts deletion of the primary language by omitting the corresponding option from the interface; however, the underlying language-deletion API endpoint does not enforce an equivalent server-side authorization check. As a result, an authenticated administrator can bypass the UI-level restriction and delete the primary language by sending a direct HTTP request to the API endpoint. Successful deletion of the primary language results in a Denial of Service (DoS) of application. Critically, when combined with a separate Cross-Site Request Forgery (CSRF) vulnerability (CVE-2026-1468) an unauthenticated remote attacker can craft a malicious link, which if visited by an authenticated administrator, will trigger the DoS condition without direct access to the application The vendor assessed the likelihood of exploitation as very low and determined that a fix is not necessary.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00575 47th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
OpenSolution	Quick.CMS	up to 6.8.0	—	No fix listed	CNA

Quick.CMS VendorOpenSolution Affected up to 6.8.0 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-63301
2026-10-03 Alias added: GHSA-4pmv-mf66-4v3h

References

Advisory 1

https://cert.pl/en/posts/2026/07/CVE-2026-63301

Other 1

https://opensolution.org/

TI-2024-38405 Quick.CMS 6.7 SQL Injection Authentication Bypass via Admin Login CVSS 4.0CRITICAL 9.3
TI-2023-23205 Cross-site scripting (XSS) vulnerability in opensolution Quick CMS v.6.7 allows a local… CVSS 3.1HIGH 8.6
TI-2023-23206 Cross-site scripting (XSS) vulnerability in opensolution Quick CMS v.6.7 allows a local… CVSS 3.1MEDIUM 5.4
TI-2023-23204 Cross-site scripting (XSS) vulnerability in opensolution Quick CMS v.6.7 allows a local… CVSS 3.1MEDIUM 5.4
TI-2023-23203 Cross-site scripting (XSS) vulnerability in opensolution Quick CMS v.6.7 allows a local… CVSS 3.1MEDIUM 5.4
TI-2023-23202 Cross-site scripting (XSS) vulnerability in opensolution Quick CMS v.6.7 allows a local… CVSS 3.1MEDIUM 5.4

See all 46 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences