Authenticated code execution via layout ZIP traversal
Published May 30, 2023 · Updated Jun 17, 2025
Path traversal in Xibo CMS 1.8.0 through 2.3.16 and 3.0.0 through 3.3.4 allows remote authenticated users to execute code via a layout ZIP. LayoutFactory::createFromZip trusts each mapping.json file value when constructing a library path instead of reducing it to a basename. An authenticated account that can import layouts can write a PHP webshell outside the CMS library and execute it as the webserver user.
Summary
What happened
Path traversal in Xibo CMS 1.8.0 through 2.3.16 and 3.0.0 through 3.3.4 allows remote authenticated users to execute code via a layout ZIP. LayoutFactory::createFromZip trusts each mapping.json file value when constructing a library path instead of reducing it to a basename. An authenticated account that can import layouts can write a PHP webshell outside the CMS library and execute it as the webserver user.
The record
- CVE
- CVE-2023-33177
- Published
- May 30, 2023
- Updated
- Jun 17, 2025
- Vendor
- Xibo Signage
- Product
- Xibo CMS
- Classifications
- CWE-22, T1190, T1505.003
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 30, 2023CVE publishedPublication date reported by the CVE source.
- Jun 17, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=>= 1.8.0, < 2.3.17
- Affected versionversion=>= 3.0.0, < 3.3.5
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Xibo CMS Zip Slip RCE Exploitproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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