CVE-2026-15386Public exploitNetwork attack vector

Stored XSS via unescaped attachment alt text

Published Aug 7, 2026 · Updated Aug 7, 2026

Stored XSS in Meow Apps Meow Gallery before 5.5.2 allows remote authenticated users to execute JavaScript in gallery visitors' browsers. Meow_MGL_Core::gallery() reads an attachment's _wp_attachment_image_alt metadata and inserts it unescaped into a linked image's aria-label attribute. Author-level access is required to upload media and set the alt text, and execution occurs when any visitor, including an administrator, views or hovers over the published linked gallery.

CVSS severity5.4
Medium
EPSS probability0.13%
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 Meow Apps Meow Gallery before 5.5.2 allows remote authenticated users to execute JavaScript in gallery visitors' browsers. Meow_MGL_Core::gallery() reads an attachment's _wp_attachment_image_alt metadata and inserts it unescaped into a linked image's aria-label attribute. Author-level access is required to upload media and set the alt text, and execution occurs when any visitor, including an administrator, views or hovers over the published linked gallery.

The record

CVE
CVE-2026-15386
Published
Aug 7, 2026
Updated
Aug 7, 2026
Vendor
Jordy Meow
Product
Meow Gallery
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 7, 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 <5.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Jordy Meow · Meow Galleryversion=0 <5.5.2

Published CVSS scores

5.4CISA-ADPCVSS: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 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 exploitPublished

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

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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