CVE-2023-0873Public exploitNetwork attack vector

Stored XSS via unescaped status names

Published Jun 27, 2023 · Updated Nov 27, 2024

Stored XSS in Kanban Boards for WordPress before 2.5.21 allows remote authenticated users to run scripts in logged-in users' browsers. The status-name setting accepts script markup and later renders it on the front-end board without sanitizing the stored value or escaping output. Administrator access is required to plant the payload, and a logged-in user must open the affected board; exposure is limited to WordPress setups without unfiltered_html.

CVSS severity4.8
Medium
EPSS probability0.55%
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 before 2.5.21 allows remote authenticated users to run scripts in logged-in users' browsers. The status-name setting accepts script markup and later renders it on the front-end board without sanitizing the stored value or escaping output. Administrator access is required to plant the payload, and a logged-in user must open the affected board; exposure is limited to WordPress setups without unfiltered_html.

The record

CVE
CVE-2023-0873
Published
Jun 27, 2023
Updated
Nov 27, 2024
Vendor
Kanban for WordPress
Product
Kanban Boards for WordPress
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 27, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 27, 2024Record 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=0 <2.5.21

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Kanban for WordPress · Kanban Boards for WordPressversion=0 <2.5.21

Published CVSS scores

4.8NVDCVSS:3.1/AV:N/AC:L/PR:H/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.

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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 exploitPublished

Weakness, pattern, technique

CWE-79Cross-Site Scripting (XSS)
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

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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