Authenticated script injection via unescaped echostr reflection
Published Jul 18, 2025 · Updated Jul 22, 2025
Cross-site scripting in wx-discuz allows remote authenticated users to inject script through the wx.php echostr parameter. The validToken function reads echostr from the query string and echoes it into the HTTP response without HTML encoding after a successful signature check. Exploitation requires a valid callback signature, the normally disabled token-validation path to be enabled, and a victim to render the crafted response.
Summary
What happened
Cross-site scripting in wx-discuz allows remote authenticated users to inject script through the wx.php echostr parameter. The validToken function reads echostr from the query string and echoes it into the HTTP response without HTML encoding after a successful signature check. Exploitation requires a valid callback signature, the normally disabled token-validation path to be enabled, and a victim to render the crafted response.
The record
- CVE
- CVE-2025-7803
- Published
- Jul 18, 2025
- Updated
- Jul 22, 2025
- Vendor
- descreekert
- Product
- wx-discuz
- Classifications
- CWE-94, CWE-79, T1059.007
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 18, 2025CVE publishedPublication date reported by the CVE source.
- Jul 22, 2025Record updatedLatest update available in the CVE record.
Exploitability
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Is a vulnerable build present?
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- Affected versionversion=12bd4745c63ec203cb32119bf77ead4a923bf277
What conditions does exploitation require?
What is affected?
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
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Your stack
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