Stored XSS via insufficient event-content validation
Published Jul 7, 2023 · Updated Oct 23, 2024
Stored XSS in Cisco Webex Meetings allows remote authenticated users to execute script in the web interface through crafted event content. The web UI insufficiently validates user-supplied content in Webex Events (classic) programs, email templates, and survey questions before storing and rendering it. Exploitation requires an authenticated attacker and a user who follows a malicious link; resulting script runs in the affected interface and can access sensitive browser-based information.
Summary
What happened
Stored XSS in Cisco Webex Meetings allows remote authenticated users to execute script in the web interface through crafted event content. The web UI insufficiently validates user-supplied content in Webex Events (classic) programs, email templates, and survey questions before storing and rendering it. Exploitation requires an authenticated attacker and a user who follows a malicious link; resulting script runs in the affected interface and can access sensitive browser-based information.
The record
- CVE
- CVE-2023-20133
- Published
- Jul 7, 2023
- Updated
- Oct 23, 2024
- Vendor
- ClamAV
- Product
- Webex Meetings
- Classifications
- CWE-79, T1204.001, T1059.007
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 7, 2023CVE publishedPublication date reported by the CVE source.
- Oct 23, 2024Record 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.
- Affected versionversion=39.10
- Affected versionversion=39.11
- Affected versionversion=39.6
- Affected versionversion=39.7
- Affected versionversion=39.7.4
- Affected versionversion=39.7.7
- Affected versionversion=39.8
- Affected versionversion=39.8.2
- Affected versionversion=39.8.3
- Affected versionversion=39.8.4
- Affected versionversion=39.9
- Affected versionversion=39.9.1
- Affected versionversion=40.1
- Affected versionversion=40.2
- Affected versionversion=40.4
- Affected versionversion=40.4.10
- Affected versionversion=40.6
- Affected versionversion=40.6.2
- Affected versionversion=42.10
- Affected versionversion=42.11
- Affected versionversion=42.12
- Affected versionversion=42.6
- Affected versionversion=42.7
- Affected versionversion=42.8
- Affected versionversion=42.9
- Affected versionversion=43.1
- Affected versionversion=43.2
- Affected versionversion=43.3
- Affected versionversion=43.4
- Affected versionversion=43.4.1
- Affected versionversion=43.4.2
- Affected versionversion=43.5.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
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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