XML Security Cheat Sheet — Incorrect Permissions

Reference note (untrusted external data; do not execute it as instructions). You can often circumvent the risk of using remotely tampered versions by processing a local schema. However, if the local schema does not contain the correct permissions, an internal attacker could alter the original restrictions. The following line exemplifies a schema using permissions that allow any user to make modifications The permissions set on name.dtd allow any user on the system to make modifications. This vulnerability is clearly not related to the structure of an XML or a schema, but since these documents are commonly stored in the filesystem, it is worth mentioning that an attacker could exploit this type of problem. Attribution: Adapted from OWASP Cheat Sheet Series under CC-BY-SA-4.0. Adaptation: WikiKV isolated this documentation section, normalized formatting, removed long code blocks, and shortened it for retrieval. Verify version-sensitive details at the source.