CVE-2023-20133
Telemetry drift only. No threshold crossed and no authority ruling changed.
CVE record, CISA KEV and EPSS as of 2026-10-18.
CVEs like this one computed, by meaning
What to do now held facts and links
- No fix version is held. The CNA's first reference is the place to look: sec.cloudapps.cisco.com
- Record your decision, dated and frozen with today's evidence: patch by a date · mitigated by a compensating control · deferred · accepted the risk · not affected
- Check your version against the ranges this record publishes.
What it is stated by the CNA
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.
- weakness
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- affected
- Cisco Webex Meetings
- published ranges
- cisco webex meetings 39.6; cisco webex meetings 39.7; cisco webex meetings 39.7.4; cisco webex meetings 39.7.7; and 28 more on the CVE page
- fixed in
- No fix version in held sources.
- severity
- 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- assigned by
- cisco
- published
- 2023-07-07
check us sec.cloudapps.cisco.com
Exploit code held, dated
- exploit code
- None held in the PoC-in-GitHub feed. A public repository changes this brief.
What moved held, dated
| date | EPSS | event |
|---|---|---|
| 8 Jul 2023 | 0.00047 | |
| 19 Jul 2023 | 0.00048 | |
| 13 Jul 2024 | 0.00055 | |
| 27 Jan 2025 | 0.00059 | |
| 17 Mar 2025 | 0.00141 | scoring model v2025.03.14 |
| 29 Mar 2025 | 0.0026 | |
| 30 Mar 2025 | 0.00141 | |
| 17 Nov 2025 | 0.00108 | |
| 18 Nov 2025 | 0.00195 | |
| 21 Nov 2025 | 0.00108 | |
| 1 Apr 2026 | 0.00135 | |
| 3 May 2026 | 0.00136 | |
| 15 Jun 2026 | 0.00517 | scoring model v2026.06.15 |
| 6 Jul 2026 | 0.00644 |
14 observations held. A step marked with a scoring model moved because the measurement was replaced, not because the vulnerability changed.
Outside the record researched, cited
This section reads the record's references and adds cited findings from outside it. It needs an account. Everything above is held facts and is complete without it.
What would change this brief held, dated
- CISA KEV
- Not listed in the catalogue we hold. A listing changes this brief.
- exploit probability
- 0.01 on 2026-07-06 (FIRST's EPSS, a probability and not evidence of exploitation). Next band line: 10% (0.10). Crossing a line changes this brief.
- fix
- No fix version is held. One published by the CNA or OSV changes this brief.
How to check this
Every value above is held with two dates: when it was true upstream (as_of) and when we recorded it (tx_from). Re-derive the exploit probability as it stood on any date:
SELECT value, source, source_version, as_of, tx_from
FROM volatile_valid_as_of('CVE-2023-20133', '2026-10-31T23:59:59.999999Z', now());