Stored script execution via unsanitized event content
Published Apr 8, 2021 · Updated Aug 3, 2024
Stored XSS in Web-School ERP 5.0 allows remote authenticated users to execute JavaScript in visitors' browsers through event content. The Add Events workflow stores event name and description input without adequate sanitization or output encoding, then renders that content when visitors view events. An attacker needs access to add an event, and exploitation requires a visitor to view the stored event; execution remains within that visitor's browser context.
Summary
What happened
Stored XSS in Web-School ERP 5.0 allows remote authenticated users to execute JavaScript in visitors' browsers through event content. The Add Events workflow stores event name and description input without adequate sanitization or output encoding, then renders that content when visitors view events. An attacker needs access to add an event, and exploitation requires a visitor to view the stored event; execution remains within that visitor's browser context.
The record
- CVE
- CVE-2021-30111
- Published
- Apr 8, 2021
- Updated
- Aug 3, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-79, T1189
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 8, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 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
- CVE-2021-30111 stored XSS video proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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