Privileged-session script execution via unsanitized account names
Published May 19, 2021 · Updated Aug 3, 2024
Stored cross-site scripting in Concerto 2.3.6 and earlier allows remote attackers to execute JavaScript in a privileged user's browser. Registration accepts First Name and Last Name values without sanitization, and the deletion confirmation modal renders those stored values as executable markup. Public registration is sufficient to plant the payload, but execution requires a privileged user to open the account-deletion confirmation; the resulting script runs with that user's web session.
Summary
What happened
Stored cross-site scripting in Concerto 2.3.6 and earlier allows remote attackers to execute JavaScript in a privileged user's browser. Registration accepts First Name and Last Name values without sanitization, and the deletion confirmation modal renders those stored values as executable markup. Public registration is sufficient to plant the payload, but execution requires a privileged user to open the account-deletion confirmation; the resulting script runs with that user's web session.
The record
- CVE
- CVE-2021-31930
- Published
- May 19, 2021
- Updated
- Aug 3, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-79, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 19, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
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Published CVSS scores
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Attacks
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Technologies
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