CVE-2020-12471

9.8 criticalEPSS 2.8%

Critical (9.8) in mono monox. EPSS 2.8% chance of exploitation in the next 30 days.

MonoX through 5.1.40.5152 allows remote code execution via HTML5Upload.ashx or Pages/SocialNetworking/lng/en-US/PhotoGallery.aspx because of deserialization in ModuleGallery.HTML5Upload, ModuleGallery.SilverLightUploadModule, HTML5Upload, and SilverLightUploadHandler.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 2.8% chance of exploitation in the next 30 days; higher than 86% of CVEs (scores of 2026-11-01)
CWE: CWE-502
Published: 2020-04-29
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mono:monox

References

https://github.com/belong2yourself/vulnerabilities/tree/master/MonoX%20CMS/Remote%20Code%20Execution%20via%20Insecure%20Deserialization
https://github.com/belong2yourself/vulnerabilities/tree/master/MonoX%20CMS/Remote%20Code%20Execution%20via%20Insecure%20Deserialization

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