CVE-2021-23835

An issue was discovered in flatCore before 2.0.0 build 139. A local file disclosure vulnerability was identified in the docs_file HTTP request body parameter for the acp interface. This can be exploited with admin access rights. The affected parameter (which retrieves the contents of the specified file) was found to be accepting malicious user input without proper sanitization, thus leading to retrieval of backend server sensitive files, e.g., /etc/passwd, SQLite database files, PHP source code, etc.

• CWE-20

• http://packetstormsecurity.com/files/160936/flatCore-CMS-XSS-File-Disclosure-SQL-Injection.htmlExploit, Third Party Advisory, VDB Entry
• https://github.com/flatCore/flatCore-CMSProduct, Third Party Advisory
• https://sec-consult.com/vulnerability-lab/Third Party Advisory
• http://packetstormsecurity.com/files/160936/flatCore-CMS-XSS-File-Disclosure-SQL-Injection.htmlExploit, Third Party Advisory, VDB Entry
• https://github.com/flatCore/flatCore-CMSProduct, Third Party Advisory
• https://sec-consult.com/vulnerability-lab/Third Party Advisory

Published

Jan 15, 2021

Last Modified

Jun 17, 2026

Status

Modified

• 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.

• CVE-2021-23814This affects versions of the package unisharp/laravel-filema…8.8
• CVE-2021-2382Vulnerability in the Oracle WebLogic Server product of Oracl…9.8
• CVE-2021-23820This affects all versions of package json-pointer. A type co…9.8
• CVE-2021-23824This affects the package Crow before 0.3+4. When using attri…6.1
• CVE-2021-23827Keybase Desktop Client before 5.6.0 on Windows and macOS, an…5.5
• CVE-2021-2383Vulnerability in the MySQL Server product of Oracle MySQL (c…4.9
• CVE-2021-23836An issue was discovered in flatCore before 2.0.0 build 139. …4.8
• CVE-2021-23837An issue was discovered in flatCore before 2.0.0 build 139. …6.5
• CVE-2021-23838An issue was discovered in flatCore before 2.0.0 build 139. …4.8
• CVE-2021-23839OpenSSL 1.0.2 supports SSLv2. If a client attempts to negoti…3.7
• CVE-2021-2384Vulnerability in the MySQL Server product of Oracle MySQL (c…4.9
• CVE-2021-23840Calls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_Decrypt…7.5