CVE-2023-0926Network attack vector

Editor-level stored XSS via unescaped tag names

Published Aug 24, 2024 · Updated Apr 8, 2026

Stored XSS in Custom Permalinks 2.6.0 and earlier allows remote authenticated users to inject scripts through crafted tag names. The post-type and taxonomy list-table renderers output attacker-controlled tag names without sufficient sanitization or escaping. Editor-level access is required, and the stored script executes when a user opens the injected page even if unfiltered_html is disabled.

CVSS severity5.4
Medium
EPSS probability0.32%
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 Custom Permalinks 2.6.0 and earlier allows remote authenticated users to inject scripts through crafted tag names. The post-type and taxonomy list-table renderers output attacker-controlled tag names without sufficient sanitization or escaping. Editor-level access is required, and the stored script executes when a user opens the injected page even if unfiltered_html is disabled.

The record

CVE
CVE-2023-0926
Published
Aug 24, 2024
Updated
Apr 8, 2026
Vendor
Sami Ahmed Siddiqui
Product
Custom Permalinks
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 24, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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=0 <=2.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Sami Ahmed Siddiqui · Custom Permalinksversion=0 <=2.6.0

Published CVSS scores

5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/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

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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