TI-2026-10235 Aliases CVE-2026-11860 GHSA-vwj5-2gmw-wjp6

Insecure Deserialisation via Plaintext HTTP leading to Remote Code Execution in Quick.CMS

LOW 34CWE-502Published 2026-06-15 · Updated 2026-06-15

Key facts

Attack vector: Adjacent network
Privileges required: None
User interaction: Passive
Attack complexity: Low
Attack requirements: Present
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

Quick.CMS deserializes user-controlled data received over plaintext HTTP without ensuring integrity or authenticity. This allows attackers to tamper with serialized payloads in transit and inject malicious objects. Because deserialization is performed without proper validation or class restrictions, crafted payloads can trigger dangerous magic methods (e.g., __wakeup() and __destruct()) and leverage gadget chains, resulting in arbitrary code execution. Exploitation is triggered automatically when an administrator accesses the admin panel. When successfully exploited, this vulnerability allows attackers to execute arbitrary code on the server via manipulated serialized data transmitted over an unprotected channel. This issue was mitigated by limiting the communication to HTTPS in a patch for version 6.8 published on 14.05.2026, deployments without this patch remain vulnerable.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00235 14th 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: Total

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	—	No fix listed	CNA

Quick.CMS VendorOpenSolution Affected up to 6.8 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-11860
2026-10-03 Alias added: GHSA-vwj5-2gmw-wjp6

References

Advisory 1

https://cert.pl/posts/2026/06/CVE-2026-11860/

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