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Vulnerability record · CVE-2025-34102 · published 10 July 2025

CVE-2025-34102: Improper input validation vulnerability

A remote code execution vulnerability exists in CryptoLog (PHP version, discontinued since 2009) due to a chained exploitation of SQL injection and command injection vulnerabilities. An unauthenticated attacker can gain shell access as the web server user by first exploiting a SQL injection flaw in login.php to bypass authentication, followed by command injection in logshares_ajax.php to execute arbitrary operating system commands. The login bypass is achieved by submitting crafted SQL via the user POST parameter. Once authenticated, the attacker can abuse the lsid POST parameter in the logshares_ajax.php endpoint to inject and execute a command using $(...) syntax, resulting in code execution under the web context. This exploitation path does not exist in the ASP.NET version of CryptoLog released since 2009.

9.3 CVSS 4.0 Critical EPSS 9.6% · top 4.7% CWE-20 · Improper input validationCWE-78 · OS command injection Deferred
9.3CVSS 4.0 base score
9.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

A remote code execution vulnerability exists in CryptoLog (PHP version, discontinued since 2009) due to a chained exploitation of SQL injection and command injection vulnerabilities. An unauthenticated attacker can gain shell access as the web server user by first exploiting a SQL injection flaw in login.php to bypass authentication, followed by command injection in logshares_ajax.php to execute arbitrary operating system commands. The login bypass is achieved by submitting crafted SQL via the user POST parameter. Once authenticated, the attacker can abuse the lsid POST parameter in the logshares_ajax.php endpoint to inject and execute a command using $(...) syntax, resulting in code execution under the web context. This exploitation path does not exist in the ASP.NET version of CryptoLog released since 2009.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/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:

References

LinkTags
https://pentest.blog/advisory-cryptolog-unauthenticated-remote-code-execution/
https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/linux/http/crypttech_cryptolog_log
https://vulncheck/advisories/cryptolog-unauthenticated-rce
https://www.exploit-db.com/exploits/41980

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Source: NIST National Vulnerability Database (record CVE-2025-34102), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.