EUVD-2026-28377
GHSA-c3xh-mwgm-9f7j
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Trigger is in the admin backend, so PR:H rather than PR:N; network-reachable with low complexity and no user interaction, and SQL injection yields high confidentiality, integrity, and availability impact on the database.
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
4DescriptionCVE.org
ChestnutCMS v1.5.10 has a SQL injection vulnerability. The content parameter of the cms_content tag can be manipulated in the admin backend and injected into a SQL query when the template is rendered.
AnalysisAI
SQL injection in ChestnutCMS v1.5.10 lets an admin-backend user manipulate the content parameter of the cms_content template tag, which is passed unsanitized into a SQL query that executes when the template is rendered. Tagged by the reporter as SQLi/Code-Injection/RCE, it can expose or corrupt database contents and potentially escalate toward code execution. A public technical writeup exists, but EPSS is 0.00% and there is no public exploit identified as actively used at time of analysis.
Technical ContextAI
ChestnutCMS is an open-source Java-based content management system (upstream repository liweiyi/ChestnutCMS). The flaw lives in its custom templating engine: the cms_content tag accepts a content parameter that is interpolated directly into a SQL statement at template-render time rather than being bound as a parameterized query. Although the assigned weakness is CWE-94 (Improper Control of Generation of Code / Code Injection) - reflecting that template-tag directives are effectively interpreted as executable logic - the concrete manifestation described is classic SQL injection (CWE-89), where attacker-controlled tag input alters query structure. Because rendering occurs server-side against the CMS database, the injection runs with the application's database privileges.
RemediationAI
No vendor-released patch or fixed version is identified at time of analysis; the only references are the upstream repository and a third-party writeup, not a tagged release. Monitor https://github.com/liweiyi/ChestnutCMS for a patched build and apply it once published. As compensating controls, restrict access to the admin backend to trusted networks or VPN and enforce strong, least-privilege admin accounts, since the flaw is triggered from authenticated backend template editing; avoid granting content or template-authoring roles to untrusted users because the cms_content tag input reaches SQL; place a WAF or database-activity monitor in front of the CMS to flag anomalous queries from the rendering path; and run the CMS database account with least privilege (no DBA rights, limited to required schemas) to blunt the impact of any successful injection. These controls reduce exposure but do not remove the underlying injection, and tightening backend access may disrupt legitimate remote content editors.
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External POC / Exploit Code
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