CVE-2025-20250Network attack vector

Cross-site scripting via improperly filtered input

Published May 21, 2025 · Updated May 21, 2025

Cross-site scripting in Cisco Webex Meetings allows unauthenticated remote attackers to run script after a user follows a malicious link. Cisco attributes the flaw to improper filtering of user-supplied input but has not identified the affected service endpoint or parameter. Exploitation requires the targeted user to follow the crafted link; successful execution affects that user's browser session rather than service availability.

CVSS severity6.1
Medium
EPSS probability0.30%
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 unauthenticated remote attackers to run script after a user follows a malicious link. Cisco attributes the flaw to improper filtering of user-supplied input but has not identified the affected service endpoint or parameter. Exploitation requires the targeted user to follow the crafted link; successful execution affects that user's browser session rather than service availability.

The record

CVE
CVE-2025-20250
Published
May 21, 2025
Updated
May 21, 2025
Vendor
ClamAV
Product
Webex Meetings
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 21, 2025CVE publishedPublication date reported by the CVE source.
  2. May 21, 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 privilegesunauthenticated

What is affected?

ClamAV · Webex Meetingsversion=N/A

Published CVSS scores

6.1CiscoCVSS:3.1/AV:N/AC:L/PR:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
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.

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Technologies

Your stack

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Your stack

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