Site-wide denial of service via CSRF route overwrite
Published Jun 20, 2023 · Updated Dec 10, 2024
Cross-site request forgery in YzmCMS 2.0 allows remote attackers to make the site inaccessible by changing URL routing rules. The URL-rule configuration route performs no token check, letting a crafted request install higher-priority invalid routes that redirect all paths. An authenticated administrator must be induced to submit the request; the documented consequence is a site-wide 404 outage, not arbitrary code execution.
Summary
What happened
Cross-site request forgery in YzmCMS 2.0 allows remote attackers to make the site inaccessible by changing URL routing rules. The URL-rule configuration route performs no token check, letting a crafted request install higher-priority invalid routes that redirect all paths. An authenticated administrator must be induced to submit the request; the documented consequence is a site-wide 404 outage, not arbitrary code execution.
The record
- CVE
- CVE-2020-20502
- Published
- Jun 20, 2023
- Updated
- Dec 10, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-352, T1204.001
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 20, 2023CVE publishedPublication date reported by the CVE source.
- Dec 10, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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
- CSRF URL-rule denial-of-service proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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