CVE-2025-20328Network attack vector

Session script execution via unvalidated profile input

Published Sep 3, 2025 · Updated Sep 3, 2025

Cross-site scripting in Cisco Webex Meetings allows remote authenticated users to execute script in a targeted user's web session. The user profile component insufficiently validates user-supplied input before returning it through the web-based interface. Exploitation requires low-privileged access and a targeted user to click a crafted link, exposing that user's session data and actions.

CVSS severity5.4
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Cisco Webex Meetings allows remote authenticated users to execute script in a targeted user's web session. The user profile component insufficiently validates user-supplied input before returning it through the web-based interface. Exploitation requires low-privileged access and a targeted user to click a crafted link, exposing that user's session data and actions.

The record

CVE
CVE-2025-20328
Published
Sep 3, 2025
Updated
Sep 3, 2025
Vendor
ClamAV
Product
Webex Meetings
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=N/A

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ClamAV · Webex Meetingsversion=N/A

Published CVSS scores

5.4CiscoCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution: Malicious Link

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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