CVE-2026-16758Network attack vector

Stored XSS via attribute-only shortcode URL escaping

Published Aug 16, 2026 · Updated Aug 16, 2026

Stored XSS in YeKen Snippet Shortcodes through 5.2.0 allows remote authenticated users to execute JavaScript via shortcode attributes. The shortcode renderer places attacker-controlled custom parameter values into URL-bearing HTML attributes and applies esc_attr() without URL-scheme validation, allowing javascript: payloads into page output. Contributor-level access or higher is required to create or edit the content, and the payload executes in each visitor's browser.

CVSS severity6.4
Medium
EPSS probability0.19%
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 YeKen Snippet Shortcodes through 5.2.0 allows remote authenticated users to execute JavaScript via shortcode attributes. The shortcode renderer places attacker-controlled custom parameter values into URL-bearing HTML attributes and applies esc_attr() without URL-scheme validation, allowing javascript: payloads into page output. Contributor-level access or higher is required to create or edit the content, and the payload executes in each visitor's browser.

The record

CVE
CVE-2026-16758
Published
Aug 16, 2026
Updated
Aug 16, 2026
Vendor
Aliakro
Product
Snippet Shortcodes
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 16, 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 <=5.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Aliakro · Snippet Shortcodesversion=0 <=5.2.0

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/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 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

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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