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CVE-2026-20233

Cross-site scripting in Cisco Webex Meetings

CVSS score

6.1

EPSS probability

%0.2

Risk score

0.0

Published

4 mo ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

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Checking session…

Vulnerability description

DayBreach CVE AI Research

CVE-2026-20233 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

A vulnerability in the web-based user interface of Cisco Webex Meetings could have allowed an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack. Cisco has addressed this vulnerability in the Webex Meetings service, and no customer action is needed. This vulnerability existed because of insufficient validation of user input. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by persuading a user to follow a malicious link. A successful exploit could have allowed the attacker to execute arbitrary script code in the browser of the targeted user or access sensitive, browser-based information.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-20233 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1ciscowebex meetings View
2ciscowebex meetings View
3ciscowebex meetings View
4ciscowebex meetings View
5ciscowebex meetings View
6ciscowebex meetings View
7ciscowebex meetings View
8ciscowebex meetings View
9ciscowebex meetings View
10ciscowebex meetings View
11ciscowebex meetings View
12ciscowebex meetings View
13ciscowebex meetings View
14ciscowebex meetings View
15ciscowebex meetings View
16ciscowebex meetings View
17ciscowebex meetings View
18ciscowebex meetings View
19ciscowebex meetings View
20ciscowebex meetings View
21ciscowebex meetings View
22ciscowebex meetings View
23ciscowebex meetings View
24ciscowebex meetings View
25ciscowebex meetings View
26ciscowebex meetings View
27ciscowebex meetings View
28ciscowebex meetings View
29ciscowebex meetings View
30ciscowebex meetings View
31ciscowebex meetings View
32ciscowebex meetings View
33ciscowebex meetings View
34ciscowebex meetings View
35ciscowebex meetings View
36ciscowebex meetings View
37ciscowebex meetings View
38ciscowebex meetings View
39ciscowebex meetings View
40ciscowebex meetings View
41ciscowebex meetings View
42ciscowebex meetings View
43ciscowebex meetings View
44ciscowebex meetings View
45ciscowebex meetings View
46ciscowebex meetings View
47ciscowebex meetings View
48ciscowebex meetings View
49ciscowebex meetings View
50ciscowebex meetings View
51ciscowebex meetings View
52ciscowebex meetings View
53ciscowebex meetings View
54ciscowebex meetings View
55ciscowebex meetings View
56ciscowebex meetings View
Total affected vendors: 1|Products: 56

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
6.1CVSS V31MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-20233 is associated with the following CWEs:

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-20233 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsGerekmiyor
UserGerekiyor

Official Sources and Advisories

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-xss-jw3NeQzSvendor-advisory

CVSS Vector Radar Chart

6.1 / 10
Attack VectorNetworkComplexityLowPrivilegesNoneUser Interact.RequiredConfidentialityLowIntegrityLowAvailabilityNone

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone required
User Interaction—
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)Low
Availability (Erişilebilirlik)None

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

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Weakness Type (CWE & CAPEC)

CWE-79

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