How severe is CVE-2023-20133?

CVE-2023-20133 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2023-20133 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-20133?

CVE-2023-20133 primarily affects Cisco Webex Meetings. In total, 32 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-20133?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-20133 published?

CVE-2023-20133 was published on 2023-07-07 and last updated on 2026-06-17.

CVE-2023-20133

CVE-2023-20133 is a medium-severity vulnerability in Cisco Webex Meetings with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Cisco Webex Meetings
Published: 2023-07-07
Last modified: 2026-06-17

Description

A vulnerability in the web interface of Cisco Webex Meetings could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the interface. This vulnerability exists because of insufficient validation of user-supplied input in Webex Events (classic) programs, email templates, and survey questions. An attacker could exploit this vulnerability by persuading a user to click a malicious 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.

Frequently asked questions

What is CVE-2023-20133?: A vulnerability in the web interface of Cisco Webex Meetings could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the interface. This vulnerability exists because of insufficient validation of user-supplied input in Webex Events (classic) programs, email templates, and survey questions. An attacker could exploit this vulnerability by persuading a user to click a malicious 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.
How severe is CVE-2023-20133?: CVE-2023-20133 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2023-20133 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-20133?: CVE-2023-20133 primarily affects Cisco Webex Meetings. In total, 32 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-20133?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-20133 published?: CVE-2023-20133 was published on 2023-07-07 and last updated on 2026-06-17.

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sxsscsrf-2L24bBx6

Affected products (32)

cpe:2.3:a:cisco:webex_meetings:39.6:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:39.7:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:39.7.4:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:39.7.7:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:39.8:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:39.8.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:39.8.3:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:39.8.4:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:39.9:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:39.9.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:39.10:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:39.11:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:40.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:40.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:40.4:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:40.4.10:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:40.6:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:40.6.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:42.6:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:42.7:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:42.8:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:42.9:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:42.10:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:42.11:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:42.12:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:43.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:43.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:43.3:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:43.4:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:43.4.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:43.4.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:43.5.0:*:*:*:*:*:*:*

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