Webex MeetingsApplication · Cisco
CVE-2025-20246
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 could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack. A vulnerability is due to improper filtering of user-supplied input. An attacker could exploit this vulnerability by persuading a user to follow a malicious link. A successful exploit could allow the attacker to conduct a cross-site scripting attack against the targeted user.
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 · moderate confidenceA cross-site scripting (XSS) vulnerability in Cisco Webex stems from improper filtering of user-supplied input. An unauthenticated, remote attacker can exploit this by tricking a user into following a malicious link, allowing arbitrary script execution in the user's browser context.
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 MeetingsApplication
all versionsCVSS 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
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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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Confirm Webex Meetings usageCheck your organization's installed applications or software inventory for Cisco Webex Meetings client or verify access to Webex meetings via web browserAffected if Cisco Webex Meetings is in use by the organization or individual users
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Identify Webex version in useIn the desktop client: click your profile picture, select Help > About Cisco Webex Meetings. In the web version: sign in and check Account settings or contact your Webex administrator for the version numberAffected if Any version of Cisco Webex Meetings is in use (all versions are affected)
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Check admin security settingsIf you have Webex admin access: sign into Webex Admin Portal, navigate to Security > Policy or Messaging settings, look for URL/link filtering or XSS protection optionsAffected if Security filtering for user-supplied links is disabled or not configured in the Webex admin console
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Inspect browser for XSS indicatorsOpen browser Developer Tools (F12), check the Network tab for unexpected requests to external domains triggered by Webex messages, or check Console for script errors related to WebexAffected if Suspicious script execution is observed in browser context from Webex message content
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Review email/link protectionCheck if your organization uses email security gateways or link protection services (such as Cisco Email Security Appliance, Umbrella, or third-party solutions) that scan Webex-shared linksAffected if No external link filtering or scanning is applied to Webex-shared URLs before users click them
If Cisco Webex Meetings is in use in the environment and no compensating controls (such as link filtering or admin security policies) are in place, the environment is vulnerable to this XSS flaw.
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 dataApply Cisco's security patches when released; until then, users should avoid clicking untrusted links in Webex communications. Organizations can implement email/link filtering as a temporary protective measure.
Fix this in Webex Meetings
Scoped from the published advisory
- Consultation2.0 h
- Testing3.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,648.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-20246 — 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-2025-20246 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data