dbcve.org
Webex MeetingsApplication · Cisco

CVE-2022-20778

MEDIUM · 6.1 CVSS v3.1 Published 2022-04-21
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
68/100
Remediation priority · Elevated
Remotely reachable No privileges

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 · unedited
A vulnerability in the authentication component of Cisco Webex Meetings could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the web-based interface. This vulnerability is due to insufficient validation of user-supplied input by the web-based interface of the authentication component of Cisco Webex Meetings. An attacker could exploit this vulnerability by persuading a user of the interface to click a maliciously crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.

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 confidence

A reflected XSS vulnerability exists in the authentication component web interface of Cisco Webex Meetings. The vulnerability stems from insufficient validation of user-supplied input, allowing unauthenticated attackers to embed malicious script through crafted links that execute in the context of the victim's browser when clicked.

MitigationApply the vendor-provided security patch from Cisco. Until patched, users should be cautioned against clicking untrusted links to the Webex authentication interface. Implementing output encoding and input validation on the authentication portal will remediate the underlying code flaw.

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
Affected:all versions

CVSS 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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify Cisco Webex Meetings authentication URLs
    Locate all URLs accessing the Webex Meetings authentication interface, typically under paths such as /login, /webex/login, or the primary Webex domain hosting the login portal. Inventory all registered Webex hostnames or aliases in your environment.
    Affected if Any Cisco Webex Meetings authentication interface is accessible on the network.
  2. Confirm the authentication web interface is reachable
    Attempt to access the identified Webex authentication URL via HTTP/HTTPS from a test client to verify the login page loads. Record the full URL including any path and query parameters displayed in the browser address bar.
    Affected if The authentication page loads and accepts user input via URL parameters.
  3. Inspect if URL parameters are reflected in the response
    Submit a test query parameter with a harmless marker (such as ?testparam=TESTMARKER) to the authentication URL, then retrieve the response page source. Search the response body for the exact string TESTMARKER appearing without encoding, entity transformation, or removal.
    Affected if The submitted parameter value appears verbatim in the HTML response without being escaped or sanitized.
  4. Check for Cisco security patch status
    Review Cisco product security notices for CVE-2022-20778 and confirm whether your specific Webex Meetings deployment version has the vendor patch applied. Consult release notes or security advisories from Cisco for the applied Webex version.
    Affected if The installed version is confirmed unpatched for this CVE or no patch confirmation is available.

If the Webex authentication interface is accessible and URL parameters are reflected into the HTML response without encoding, the environment is vulnerable to CVE-2022-20778.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply the vendor-provided security patch from Cisco. Until patched, users should be cautioned against clicking untrusted links to the Webex authentication interface. Implementing output encoding and input validation on the authentication portal will remediate the underlying code flaw.

Recommended fix Moderate confidence

Refer to Cisco advisory for Cisco Webex Meetings specific fixed release

  1. Navigate to the Cisco Security Advisories page at tools.cisco.com
  2. Search for CVE-2022-20778 to locate the specific security advisory
  3. Follow the remediation guidance provided in the Cisco advisory for your deployment type
  4. Apply the recommended update or configuration change

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Webex Meetings Scoped from the published advisory
  • Consultation2.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
16.0 hours of engineering $2,800
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Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-20778 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
  • 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