CVE-2026-52775

Summary YesWiki through the latest development branch contains a SQL injection vulnerability in ReactionManager::deleteUserReaction() that allows any authenticated user to inject arbitrary SQL via the {idreaction} and {id} URL path parameters. The parameters are concatenated directly into a SQL LIKE clause without escaping or parameterization. This is a sibling of CVE-2026-46670 (unauthenticated SQLi in FormManager::create()). Both share the same root cause — raw string concatenation into SQL queries — but exist in different components. Root Cause includes/controllers/ApiController.php line 726: /** - @Route("/api/reactions/{idreaction}/{id}/{page}/{username}", methods={"DELETE"}, options={"acl":{"+"}}) */ ACL "+" = any authenticated user. Parameters flow into ReactionManager::deleteUserReaction() → TripleStore::delete() with raw string concatenation into SQL LIKE clause (line 356). The if branch (lines 340-354) properly uses $this->dbService->escape(). The else branch does not — the developer applied escaping to one code path but not the other. PoC DELETE /wiki/?api/reactions/x%27%20OR%201=1%20OR%20value%20LIKE%20%27/test/SomePage/attacker Host: localhost:8085 Cookie: <session cookie> Time-based blind variant via {id} parameter for data exfiltration. Impact Full database read/write. Any self-registered user can extract yeswiki_users password hashes and emails. Suggested Fix Apply $this->dbService->escape() to all parameters in the else branch, matching the if branch pattern. Also audit all TripleStore::delete() callers that pass $extraSQL. Credits Kai Aizen / SnailSploit

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