Webex TrainingApplication · Cisco
CVE-2020-3542
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA vulnerability in Cisco Webex Training could allow an authenticated, remote attacker to join a password-protected meeting without providing the meeting password. The vulnerability is due to improper validation of input to API requests that are a part of meeting join flow. An attacker could exploit this vulnerability by sending an API request to the application, which would return a URL that includes a meeting join page that is prepopulated with the meeting username and password. A successful exploit could allow the attacker to join the password-protected meeting. The attacker would be visible in the attendee list of the meeting.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceIn Cisco Webex Training, the meeting join API improperly validates input, allowing an authenticated attacker to craft a specific API request that returns a pre-populated meeting URL containing valid credentials, bypassing the password requirement.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
Webex TrainingApplication
< 40.7.6CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- High
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify Cisco Webex Training usageReview your organization's software inventory or subscription list to determine if Cisco Webex Training is in useAffected if Your organization uses Cisco Webex Training as a hosted service
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Check Webex client versionOpen the Cisco Webex desktop client, click on your profile picture, select 'About Webex' or check Help > About to view the client version numberAffected if Client version is listed and is prior to 40.7.6
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Verify Webex service versionIf you have administrative access to Webex Control Hub or your organization's Webex account settings, navigate to Services > Meetings or similar section to view the deployed Webex versionAffected if Service version cannot be verified as 40.7.6 or later, or the interface shows no version information
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Review meeting audit logs for unauthorized accessAccess Webex Control Hub or meeting audit logs, look for meeting sessions where attendees joined without providing the expected password, especially at unusual times or by unexpected usersAffected if Logs show meeting joins that bypassed password requirements or show unexpected access patterns
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Check for credential exposure in API responsesIf you have access to API logs or can test the meeting join API, verify that responses do not contain pre-populated meeting URLs with embedded credentialsAffected if API responses return meeting URLs with valid embedded credentials without requiring password input
Your environment is affected if you use Cisco Webex Training and cannot confirm that Cisco has patched the infrastructure to version 40.7.6 or later, or if meeting audit logs show signs of unauthorized password-bypass access.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor data40.7.6
Cisco has addressed this vulnerability in their infrastructure; customers should verify the fix is applied and review meeting audit logs for unauthorized access.
Fix this in Webex Training
Scoped from the published advisory
- Consultation2.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-3542 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2020-3542 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
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