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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.

PUBLISHED Reserved 2026-06-04 | Published 2026-06-04 | Updated 2026-06-04 | Assigner VulnCheck




CRITICAL: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

Cross-Site Request Forgery (CSRF)

Product status

3.0
affected

Credits

dd_ (info@malicious.group) finder

References

www.exploit-db.com/exploits/46276 (ExploitDB-46276) exploit

codecanyon.net/user/simcy_creative (Official Product Homepage) product

codecanyon.net/...res-and-sign-pdf-documents-online/20737707 (Product Reference) product

www.vulncheck.com/...-template-injection-rce-via-csrf-cookie (VulnCheck Advisory: PDF Signer 3.0 Server-Side Template Injection RCE via CSRF Cookie) third-party-advisory

cve.org (CVE-2019-25729)

nvd.nist.gov (CVE-2019-25729)

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