Code execution via unsafe attstr deserialization
Published Dec 31, 2025 · Updated Dec 31, 2025
Object injection in EyouCMS 1.7.7 and earlier allows remote authenticated users to execute PHP code through the arcpagelist handler. Ajax.php passes the ey_arcmulti.attstr database value through stripslashes() to native unserialize() without blocking object classes, enabling ThinkPHP gadget chains. Exploitation requires prior write access to the database or an administrative template change, a valid tag identifier, and a visit to a paginated arclist page; demonstrated effects include code execution and file deletion.
Summary
What happened
Object injection in EyouCMS 1.7.7 and earlier allows remote authenticated users to execute PHP code through the arcpagelist handler. Ajax.php passes the ey_arcmulti.attstr database value through stripslashes() to native unserialize() without blocking object classes, enabling ThinkPHP gadget chains. Exploitation requires prior write access to the database or an administrative template change, a valid tag identifier, and a visit to a paginated arclist page; demonstrated effects include code execution and file deletion.
The record
- CVE
- CVE-2025-15375
- Published
- Dec 31, 2025
- Updated
- Dec 31, 2025
- Vendor
- Hainan Zanzan Network Technology Co., Ltd.
- Product
- EyouCMS
- Classifications
- CWE-502, CWE-20, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Dec 31, 2025CVE publishedPublication date reported by the CVE source.
- Dec 31, 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=1.7.0
- Affected versionversion=1.7.1
- Affected versionversion=1.7.2
- Affected versionversion=1.7.3
- Affected versionversion=1.7.4
- Affected versionversion=1.7.5
- Affected versionversion=1.7.6
- Affected versionversion=1.7.7
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
- EyouCMS 1.7.7 second-order object-injection proof of conceptproof of concept · demonstrated
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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