Meeting credential disclosure via hard-coded encryption key
Published Jul 26, 2023 · Updated Apr 8, 2026
Sensitive information exposure in Video Conferencing with Zoom before 4.2.2 allows remote attackers to read meeting IDs and passwords. The vczapi_encrypt_decrypt function protects stored meeting values with an encryption key hard-coded in the plugin, allowing ciphertext to be decrypted outside the site. No authentication is required, but exploitation requires access to an encrypted meeting value; the consequence is limited to disclosure of its meeting ID and password.
Summary
What happened
Sensitive information exposure in Video Conferencing with Zoom before 4.2.2 allows remote attackers to read meeting IDs and passwords. The vczapi_encrypt_decrypt function protects stored meeting values with an encryption key hard-coded in the plugin, allowing ciphertext to be decrypted outside the site. No authentication is required, but exploitation requires access to an encrypted meeting value; the consequence is limited to disclosure of its meeting ID and password.
The record
- CVE
- CVE-2023-3947
- Published
- Jul 26, 2023
- Updated
- Apr 8, 2026
- Vendor
- Zoom Video Communications, Inc.
- Product
- Zoom
- Classifications
- CWE-321, T1552
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 26, 2023CVE publishedPublication date reported by the CVE source.
- Apr 8, 2026Record 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=0 <=4.2.1
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.
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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