Authenticated code execution via taskUrl deserialization
Published Jul 27, 2025 · Updated Jul 28, 2025
Unsafe deserialization in ChanCMS 3.1.2 and earlier allows remote authenticated users to execute code through a crafted taskUrl value. The /collect/getArticle handler accepts attacker-controlled taskUrl data for deserialization without adequate validation; the public record does not identify the exact deserializer. Low-privileged access to the network endpoint is required, and successful exploitation executes code in the server process context.
Summary
What happened
Unsafe deserialization in ChanCMS 3.1.2 and earlier allows remote authenticated users to execute code through a crafted taskUrl value. The /collect/getArticle handler accepts attacker-controlled taskUrl data for deserialization without adequate validation; the public record does not identify the exact deserializer. Low-privileged access to the network endpoint is required, and successful exploitation executes code in the server process context.
The record
- CVE
- CVE-2025-8227
- Published
- Jul 27, 2025
- Updated
- Jul 28, 2025
- Vendor
- ChanCMS
- Product
- ChanCMS
- Classifications
- CWE-502, CWE-20, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 27, 2025CVE publishedPublication date reported by the CVE source.
- Jul 28, 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=3.1.0
- Affected versionversion=3.1.1
- Affected versionversion=3.1.2
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
- ChanCMS taskUrl deserialization proof of conceptproof 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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