CVE-2025-11834Network attack vector

Stored XSS via unescaped shortcode startindex

Published Oct 22, 2025 · Updated Oct 22, 2025

Stored XSS in WP AD Gallery 1.3 and earlier allows remote authenticated users to inject scripts through the ad-gallery startindex attribute. The shortcode handler accepts startindex without sufficient sanitization and emits it into generated gallery markup without context-appropriate output escaping. Contributor-level access is required to save the crafted shortcode; the payload then executes in the browser of anyone who visits the affected page.

CVSS severity6.4
Medium
EPSS probability0.18%
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 WP AD Gallery 1.3 and earlier allows remote authenticated users to inject scripts through the ad-gallery startindex attribute. The shortcode handler accepts startindex without sufficient sanitization and emits it into generated gallery markup without context-appropriate output escaping. Contributor-level access is required to save the crafted shortcode; the payload then executes in the browser of anyone who visits the affected page.

The record

CVE
CVE-2025-11834
Published
Oct 22, 2025
Updated
Oct 22, 2025
Vendor
Wiellyam Roberto
Product
WP AD Gallery
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 22, 2025Record 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=* <=1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Wiellyam Roberto · WP AD Galleryversion=* <=1.3

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.

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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/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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