CVE-2022-45363Known exploitationNetwork attack vector

Subscriber-level stored XSS via visual editor authorization bypass

Published Nov 22, 2022 · Updated Apr 28, 2026

Stored XSS in Muffin Group BeTheme 26.6.1 and earlier allows remote authenticated users to inject script through its visual editor. The mfnvb_init_vb() function omits a capability check when initializing the editor, exposing page-builder nonces and edit functionality to subscribers. A subscriber can store JavaScript in a post or page, and the script executes in the site origin when another user views the modified content.

CVSS severity5.4
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Muffin Group BeTheme 26.6.1 and earlier allows remote authenticated users to inject script through its visual editor. The mfnvb_init_vb() function omits a capability check when initializing the editor, exposing page-builder nonces and edit functionality to subscribers. A subscriber can store JavaScript in a post or page, and the script executes in the site origin when another user views the modified content.

The record

CVE
CVE-2022-45363
Published
Nov 22, 2022
Updated
Apr 28, 2026
Vendor
Muffin Group
Product
BeTheme
Classifications
CWE-79, CAPEC-592, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 22, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2026Record 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 <=26.6.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Muffin Group · BeThemeversion=n/a <=26.6.1

Published CVSS scores

5.4PatchstackCVSS:3.1/AV:N/AC:L/PR:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-592Stored XSS
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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.

Reported exploitation

Technologies

Your stack

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Your stack

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