CVE-2023-34368Network attack vector

Stored XSS via unsanitized admin settings

Published Jun 22, 2023 · Updated Apr 28, 2026

Stored XSS in Kanban Boards for WordPress 2.5.20 and earlier allows remote authenticated users to inject scripts through admin settings. Admin settings persist option values without adequate input sanitization and output escaping, causing injected JavaScript to execute when affected pages render. Administrator access is required, and exposure is limited to multisite installations or sites where unfiltered_html is disabled.

CVSS severity5.9
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Kanban Boards for WordPress 2.5.20 and earlier allows remote authenticated users to inject scripts through admin settings. Admin settings persist option values without adequate input sanitization and output escaping, causing injected JavaScript to execute when affected pages render. Administrator access is required, and exposure is limited to multisite installations or sites where unfiltered_html is disabled.

The record

CVE
CVE-2023-34368
Published
Jun 22, 2023
Updated
Apr 28, 2026
Vendor
Kanban for WordPress
Product
Kanban Boards for WordPress
Classifications
CWE-79, CAPEC-592, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 22, 2023CVE 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 <=2.5.20 changes=[{"at":"2.5.21","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Kanban for WordPress · Kanban Boards for WordPressversion=n/a <=2.5.20 changes=[{"at":"2.5.21","status":"unaffected"}]

Published CVSS scores

4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.4WordfenceCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
5.9PatchstackCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
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.

Technologies

Your stack

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Your stack

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