Cross-site scripting via unescaped array template values
Published Sep 21, 2021 · Updated Sep 16, 2024
Type confusion in AdonisJS Edge before 5.3.2 allows remote attackers to inject executable markup by supplying array template values. The escape() path returned arrays unchanged because it escaped only strings, while template interpolation inserted the array's string form into HTML. Exploitation requires an application to pass attacker-controlled arrays into an escaped interpolation and a user to view the rendered page, where injected script runs in that page's origin.
Summary
What happened
Type confusion in AdonisJS Edge before 5.3.2 allows remote attackers to inject executable markup by supplying array template values. The escape() path returned arrays unchanged because it escaped only strings, while template interpolation inserted the array's string form into HTML. Exploitation requires an application to pass attacker-controlled arrays into an escaped interpolation and a user to view the rendered page, where injected script runs in that page's origin.
The record
- CVE
- CVE-2021-23443
- Published
- Sep 21, 2021
- Updated
- Sep 16, 2024
- Vendor
- AdonisJS
- Product
- Edge
- Classifications
- CWE-843, T1059.007
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 21, 2021CVE publishedPublication date reported by the CVE source.
- Sep 16, 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?
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- Affected versionversion=unspecified <5.3.2
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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Technologies
Your stack
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Your stack
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