CVE-2026-66644Network attack vector

Stored XSS via unescaped shortcode attributes

Published Aug 18, 2026 · Updated Aug 18, 2026

Stored XSS in the Typing Effect plugin before 1.3.7 allows remote authenticated users to inject script via crafted shortcode attributes. Before the 1.3.7 patch, nine93Typed::do_shortcode copied every supplied shortcode attribute into data-* attributes on the generated span and did not escape values or reject unexpected keys. A contributor who can place the typed shortcode in content can persist JavaScript that runs in other users' browsers when an injected page is viewed.

CVSS severity6.5
Medium
EPSS probability0.16%
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 the Typing Effect plugin before 1.3.7 allows remote authenticated users to inject script via crafted shortcode attributes. Before the 1.3.7 patch, nine93Typed::do_shortcode copied every supplied shortcode attribute into data-* attributes on the generated span and did not escape values or reject unexpected keys. A contributor who can place the typed shortcode in content can persist JavaScript that runs in other users' browsers when an injected page is viewed.

The record

CVE
CVE-2026-66644
Published
Aug 18, 2026
Updated
Aug 18, 2026
Vendor
93digital
Product
Typing Effect
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 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 <=1.3.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

93digital · Typing Effectversion=n/a <=1.3.7

Published CVSS scores

6.5PatchstackCVSS:3.1/AV:N/AC:L/PR:L/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

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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