CVE intelligence and bounded remediation
CVE-2024-8707 — A vulnerability was found in 云课网络科技有限公司 Yunke Online School System up to 3.0.6
A vulnerability was found in 云课网络科技有限公司 Yunke Online School System up to 3.0.6. It has been declared as problematic. This vulnerability affects the function downfile of the file application/admin/controller/Appadmin.php. The manipulation of the argument url leads to path traversal. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.
- Severity
- Medium
- CVSS
- 5.3 (4.0)
- Published
- 2024-09-12
- CISA KEV
- Not currently listed
- Ecosystem
- software/application
- Weaknesses
- CWE-22
Affected products
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Matched remediation archetype
Path traversal, unsafe upload, and file handling
This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.
Check exposure
- Trace untrusted filenames, archive entries, URLs, and path segments into read, write, include, extraction, and upload operations.
- Identify filesystem roots, mount permissions, symbolic-link behavior, archive handling, and whether uploaded content is web-accessible or executable.
- Review canonicalization and containment checks across supported operating systems and storage backends.
Remediate safely
- Generate server-side storage identifiers and resolve paths beneath a fixed root using filesystem-aware containment checks.
- Reject absolute, parent-relative, alternate-separator, device, link, and archive entries that escape the intended root.
- Store uploads outside executable or served paths, validate type and size, and use private atomic temporary files.
Authoritative sources
Complete CVE record and remediation plan
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