27 Oct 2021 — mayamcdougall commented. mayamcdougall. on Oct 27, 2021. Collaborator. Hello there! 👋🏻 (For our reference, this is a "duplicate" Pico 3.0.0-alpha.2 Exploit - Google Groups
If an immediate upgrade is impossible, you must manually enforce strict input validation in your core routing file (typically involving Pico.php or the request handler). Ensure all incoming page requests are strictly filtered using PHP's basename() function or a strict regex whitelist:
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Releases · picocms/Pico - GitHub
In a secure Pico installation, Twig templates are sandboxed to prevent _self.env.registerUndefinedFilterCallback("exec") style attacks. However, in alpha.2, the allowed_functions blacklist was incomplete.
While the exploit successfully bypasses standard token count enforcements, the structural bugs in the alpha preprocessor impose specific constraints on what can be executed:
releases for production to ensure the security of the end-user. Proof of Concept for this vulnerability?
The Pico Content Management System (CMS) has long been a favorite among developers who prioritize speed and simplicity. Unlike database-driven behemoths like WordPress or Drupal, Pico is a flat-file CMS—meaning it stores all content in Markdown files. This architecture traditionally offers a smaller attack surface.
27 Oct 2021 — mayamcdougall commented. mayamcdougall. on Oct 27, 2021. Collaborator. Hello there! 👋🏻 (For our reference, this is a "duplicate" Pico 3.0.0-alpha.2 Exploit - Google Groups
If an immediate upgrade is impossible, you must manually enforce strict input validation in your core routing file (typically involving Pico.php or the request handler). Ensure all incoming page requests are strictly filtered using PHP's basename() function or a strict regex whitelist: Pico 3.0.0-alpha.2 Exploit
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Releases · picocms/Pico - GitHub 27 Oct 2021 — mayamcdougall commented
In a secure Pico installation, Twig templates are sandboxed to prevent _self.env.registerUndefinedFilterCallback("exec") style attacks. However, in alpha.2, the allowed_functions blacklist was incomplete. Collaborator
While the exploit successfully bypasses standard token count enforcements, the structural bugs in the alpha preprocessor impose specific constraints on what can be executed:
releases for production to ensure the security of the end-user. Proof of Concept for this vulnerability?
The Pico Content Management System (CMS) has long been a favorite among developers who prioritize speed and simplicity. Unlike database-driven behemoths like WordPress or Drupal, Pico is a flat-file CMS—meaning it stores all content in Markdown files. This architecture traditionally offers a smaller attack surface.