Identity disclosure via content-script session storage
Published Mar 9, 2022 · Updated Dec 9, 2025
Information disclosure in Microsoft Skype Extension for Chrome before 10.2.0.9951 allows remote attackers to read a user's Skype ID. The setUserId function writes the Microsoft-account identifier from an extension content script into the visited site's sessionStorage, exposing it to page scripts. The victim must be signed in to a Microsoft account and visit an attacker-controlled site; the identifier reveals the associated Skype name and avatar.
Summary
What happened
Information disclosure in Microsoft Skype Extension for Chrome before 10.2.0.9951 allows remote attackers to read a user's Skype ID. The setUserId function writes the Microsoft-account identifier from an extension content script into the visited site's sessionStorage, exposing it to page scripts. The victim must be signed in to a Microsoft account and visit an attacker-controlled site; the identifier reveals the associated Skype name and avatar.
The record
- CVE
- CVE-2022-24522
- Published
- Mar 9, 2022
- Updated
- Dec 9, 2025
- Vendor
- Microsoft
- Product
- Skype Extension for Chrome
- Classifications
- T1087.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 9, 2022CVE publishedPublication date reported by the CVE source.
- Dec 9, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.0.0 <10.2.0.9951
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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
- sessionStorage Skype ID disclosure proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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