CVE-2023-5338Network attack vector

Stored XSS via unescaped column shortcode attributes

Published Nov 22, 2023 · Updated Apr 8, 2026

Stored XSS in Theme Blvd Shortcodes 1.6.8 and earlier allows remote authenticated users to inject scripts through shortcode attributes. The column shortcode renderer inserts user-controlled attribute values into generated HTML without context-appropriate escaping. Contributor-level access is required to store a payload in page content; the script executes when another user opens the affected page.

CVSS severity6.4
Medium
EPSS probability0.44%
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 Theme Blvd Shortcodes 1.6.8 and earlier allows remote authenticated users to inject scripts through shortcode attributes. The column shortcode renderer inserts user-controlled attribute values into generated HTML without context-appropriate escaping. Contributor-level access is required to store a payload in page content; the script executes when another user opens the affected page.

The record

CVE
CVE-2023-5338
Published
Nov 22, 2023
Updated
Apr 8, 2026
Vendor
Theme Blvd
Product
Theme Blvd Shortcodes
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 22, 2023CVE 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 <=1.6.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Theme Blvd · Theme Blvd Shortcodesversion=0 <=1.6.8

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
5.4NIST NVDCVSS: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 exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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