CVE-2026-27202
Arbitrary File Read Vulnerability in GetSimple CMS Uploaded Files
Publication date: 2026-02-21
Last updated on: 2026-02-24
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| getsimple-ce | getsimple_cms | 3.3.22 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-22 | The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. |
| CWE-23 | The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
[{'type': 'paragraph', 'content': 'CVE-2026-27202 is a high-severity arbitrary file read vulnerability in GetSimple CMS CE version 3.3.22, specifically in the file upload.php feature.'}, {'type': 'paragraph', 'content': 'The vulnerability occurs because the application improperly handles external input used to build file pathnames within a restricted directory. It fails to neutralize directory traversal sequences like "..", which allows attackers to access files outside the intended upload directory.'}, {'type': 'paragraph', 'content': 'An attacker can exploit this flaw to retrieve sensitive system files by crafting URLs that access files outside the upload folder, leading to exposure of confidential data and a systemic security breach.'}, {'type': 'paragraph', 'content': 'This weakness corresponds to CWE-23 (Relative Path Traversal) and, as of the time of reporting, no patched versions are available.'}] [1]
How can this vulnerability impact me? :
This vulnerability can lead to unauthorized disclosure of sensitive system files and confidential data by allowing attackers to read arbitrary files outside the intended upload directory.
Such exposure can cause a systemic security breach, potentially compromising the integrity and confidentiality of the affected system.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
[{'type': 'paragraph', 'content': 'This vulnerability can be detected by attempting to access files outside the intended upload directory using directory traversal sequences such as ".." in the file path. For example, by sending HTTP requests to URLs similar to the vulnerable endpoint and checking if files outside the upload directory can be read.'}, {'type': 'list_item', 'content': 'Use curl or wget to send requests to the upload directory with traversal sequences, e.g.:'}, {'type': 'list_item', 'content': 'curl http://<target-ip>/GetSimpleCMS-CE-3.3.22/data/uploads/../config.php'}, {'type': 'list_item', 'content': 'curl http://<target-ip>/GetSimpleCMS-CE-3.3.22/data/uploads/1.txt'}, {'type': 'paragraph', 'content': 'If the response contains contents of files outside the upload directory, the system is vulnerable.'}] [1]
What immediate steps should I take to mitigate this vulnerability?
[{'type': 'paragraph', 'content': 'No patched versions are available at the time of reporting, so immediate mitigation steps include:'}, {'type': 'list_item', 'content': 'Restrict access to the upload.php feature by limiting network exposure or using firewall rules.'}, {'type': 'list_item', 'content': 'Implement web server rules to block requests containing directory traversal sequences such as "..".'}, {'type': 'list_item', 'content': 'Monitor and audit access logs for suspicious requests targeting the upload directory.'}, {'type': 'list_item', 'content': 'Consider disabling or restricting file upload functionality until a fix is available.'}] [1]