Webex MeetingsApplication · Cisco
CVE-2025-20247
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 confidenceThis is a reflected cross-site scripting (XSS) vulnerability in Cisco Webex. The application fails to properly filter or sanitize user-supplied input before embedding it in web pages. An unauthenticated attacker can craft a malicious URL that, when clicked by a victim, causes the victim's browser to execute arbitrary JavaScript in the context of the vulnerable Webex domain.
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 Cisco Webex Meetings is deployedIdentify whether your organization runs any Cisco Webex Meetings servers or uses the Webex Meetings service. Check for installed meeting server software, DNS records pointing to Webex infrastructure, or service subscriptions.Affected if If Cisco Webex Meetings is deployed and accessible, the environment is affected since all versions contain the reflected XSS vulnerability.
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Identify Webex Meetings web access pointsReview network configurations, reverse proxies, and firewall rules to determine if Webex Meetings web interfaces are exposed to internal or external users. Check for URLs matching Webex meeting domains.Affected if If the Webex web interface is accessible to users, the reflected XSS vulnerability can be exploited through malicious links.
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Check for Content Security Policy headersInspect HTTP responses from Webex Meetings pages using browser developer tools or a web proxy. Look for Content-Security-Policy headers in the response headers.Affected if If no CSP headers are present, users have no browser-side protection against the XSS attack vector.
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Audit email security for link filteringReview email gateway or security appliance configurations to determine if links in emails are being scanned or rewritten before delivery to end users.Affected if If there is no email link scanning or URL rewriting in place, users are more directly exposed to malicious crafted URLs.
Your environment is affected if Cisco Webex Meetings web interface is accessible to users, as all versions contain the reflected XSS flaw and exploitation requires only that a user clicks a malicious link.
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 the vendor patch when available. Until then, users should avoid clicking untrusted links and organizations can implement Content Security Policy (CSP) headers and output encoding as defense-in-depth measures.
Fix this in Webex Meetings
Scoped from the published advisory
- Consultation4.0 h
- Implementation8.0 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 $5,120.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-20247 — 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-2025-20247 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
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