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Webex Connect ImApplication · Cisco

CVE-2018-0276

MEDIUM · 6.1 CVSS v3.0 Published 2018-04-19
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 Cisco WebEx Connect IM could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of an affected system. The vulnerability is due to insufficient input validation of some parameters that are passed to the web server of the affected system. An attacker could exploit this vulnerability by convincing a user to follow a malicious link or by intercepting a user request and injecting malicious code into the request. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected web interface or allow the attacker to access sensitive browser-based information. Cisco Bug IDs: CSCvi07812.

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

Cross-site scripting (XSS) vulnerability in Cisco WebEx Connect IM caused by insufficient input validation of parameters passed to the web server. An unauthenticated remote attacker can inject malicious script code via a crafted link or intercepted request, executing arbitrary JavaScript in the context of the victim's browser session or exfiltrating sensitive browser-based information.

MitigationApply the vendor patch from Cisco (refer to CSCvi07812) when available. Until patched, users should avoid clicking untrusted links and organizations may consider network-based URL filtering as a compensating control.

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 Connect ImApplication
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:3.0/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. Verify Cisco Webex Connect IM is installed
    Check system for Webex Connect IM installation - look for installation directories (typically under Program Files/Cisco or similar), check installed programs list, or search for 'WebexConnect' executable files on the system
    Affected if Cisco Webex Connect IM software is found installed on the system
  2. Identify if web server component is running
    Check if Webex Connect IM web service is active - look for processes listening on common web ports (typically ports 80/443 or configured ports), check Windows services or process list for Webex-related web services
    Affected if Webex Connect IM web server component is running and accessible via network
  3. Test for XSS vulnerability in web interface
    Access the Webex Connect IM web login or interaction page and attempt to inject a test XSS payload (such as <script>alert('XSS')</script>) into input parameters such as login fields, URL parameters, or message content fields
    Affected if Injected script code executes in the browser when submitting the crafted payload, confirming the XSS vulnerability is present
  4. Review web server access logs for exploitation attempts
    Examine Webex Connect IM web server logs for suspicious patterns including script tags, javascript: URIs, or encoded XSS vectors in request parameters that may indicate attempted exploitation
    Affected if Logs show evidence of XSS injection attempts against the web interface

A user is affected if Cisco Webex Connect IM is installed and its web server component is accessible, as all versions of this product contain the XSS vulnerability in the web server's input validation.

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.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply the vendor patch from Cisco (refer to CSCvi07812) when available. Until patched, users should avoid clicking untrusted links and organizations may consider network-based URL filtering as a compensating control.

Fix this in Webex Connect Im Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing3.0 h
  • Review / QA1.0 h
8.0 hours of engineering $1,390
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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-2018-0276 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