What’s Vulnerable › Vulnerabilities

CVE-2019-25729: PDF Signer 3.0 Server-Side Template Injection RCE via CSRF Cookie

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-04 · updated 2026-07-22
• Weakness: CWE-352

Description

PDF Signer 3.0 contains a server-side template injection vulnerability that allows unauthenticated attackers to execute arbitrary code by injecting PHP commands through the CSRF-TOKEN cookie parameter. Attackers can craft malicious cookie values containing template injection payloads like shell_exec() to execute system commands and retrieve sensitive information from the server.

Affected products

• simcy_creative PDF Signer: 3.0

References

• https://codecanyon.net/item/signer-create-digital-signatures-and-sign-pdf-documents-online/20737707
• https://codecanyon.net/user/simcy_creative
• https://www.exploit-db.com/exploits/46276
• https://www.vulncheck.com/advisories/pdf-signer-server-side-template-injection-rce-via-csrf-cookie

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