Authenticated script execution via unsanitized web requests
Published Mar 12, 2020 · Updated Feb 28, 2025
Cross-site scripting in Microsoft Exchange Server 2016 and 2019 allows remote authenticated users to execute script via a crafted web request. Microsoft has disclosed only that Exchange fails to sanitize the specially crafted request and has not identified the affected handler or field. Exploitation requires low-privileged authentication and user interaction, and the resulting script can read or alter data in the victim's browser context.
Summary
What happened
Cross-site scripting in Microsoft Exchange Server 2016 and 2019 allows remote authenticated users to execute script via a crafted web request. Microsoft has disclosed only that Exchange fails to sanitize the specially crafted request and has not identified the affected handler or field. Exploitation requires low-privileged authentication and user interaction, and the resulting script can read or alter data in the victim's browser context.
The record
- CVE
- CVE-2020-0903
- Published
- Mar 12, 2020
- Updated
- Feb 28, 2025
- Vendor
- Microsoft
- Product
- Microsoft Exchange Server 2019 Cumulative Update 4
- Classifications
- CWE-79, T1059.007
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 12, 2020CVE publishedPublication date reported by the CVE source.
- Feb 28, 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?
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- Affected versionversion=unspecified
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
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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