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SPIP Crayons Plugin

The Crayons plugin for SPIP before 3.5.0 contains a missing authorization vulnerability that allows unauthenticated attackers to modify arbitrary editable object fields by omitting the secu_ anti-forgery parameter in crayons_store.php, causing the authorization dispatcher to resolve an unconditionally-true handler instead of the proper modification check. Attackers can chain this flaw to write a malicious .html skeleton file, disclose sensitive configuration files containing the site secret, and forge a signed ajax context to execute the uploaded skeleton, achieving arbitrary PHP code execution as the web-server user.

SPIP

SPIP before 4.4.18 contains a mass assignment vulnerability in the editer_objet action that allows unauthenticated attackers to write arbitrary rows to any SQL table lacking a champs_editables allowlist by supplying an attacker-controlled arg parameter resolving to internal database tables. Attackers can insert a malicious row into the spip_jobs queue with a controlled PHP function and arguments, which is then dynamically executed when the cron processes the queue, resulting in remote code execution.

SPIP

SPIP before version 4.4.18 contains a missing authorization vulnerability in sensitive actions under ecrire/action/ that allows unauthenticated attackers to invoke privileged actions by supplying only a valid CSRF nonce without any server-side permission check. Attackers can bypass template-level authorization guards through direct HTTP requests to invoke actions such as editer_auteur, enabling arbitrary account password rewrites including administrator accounts and resulting in full account takeover.