CVE-2025-2537Network attack vector

Stored DOM XSS via unescaped ThickBox attributes

Published Jul 3, 2025 · Updated Apr 8, 2026

Stored DOM-based XSS in NextGEN Gallery 3.59.11 and earlier allows remote authenticated users to execute scripts in visitors' browsers. The same flaw affects Auto Thickbox 3.5 and earlier and YouTube Embed, Playlist and Popup by WpDevArt 2.6.7 and earlier because bundled ThickBox 3.1 code uses user-supplied attributes without sufficient sanitization or output escaping. Contributor-level access is required to store a payload in a page, and the script executes when a visitor opens that page in the site's security context.

CVSS severity6.4
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored DOM-based XSS in NextGEN Gallery 3.59.11 and earlier allows remote authenticated users to execute scripts in visitors' browsers. The same flaw affects Auto Thickbox 3.5 and earlier and YouTube Embed, Playlist and Popup by WpDevArt 2.6.7 and earlier because bundled ThickBox 3.1 code uses user-supplied attributes without sufficient sanitization or output escaping. Contributor-level access is required to store a payload in a page, and the script executes when a visitor opens that page in the site's security context.

The record

CVE
CVE-2025-2537
Published
Jul 3, 2025
Updated
Apr 8, 2026
Vendor
Sandhills Development, LLC
Product
NextGEN Gallery
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 3, 2025CVE 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 <=3.59.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Sandhills Development, LLC · NextGEN Galleryversion=0 <=3.59.11
WpDevArt · YouTube Embed, Playlist and Popup by WpDevArtversion=0 <=2.6.7
Denis de Bernardy · Auto Thickboxversion=0 <=3.5

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 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')
T1059.007Command 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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