CVE-2026-16537Public exploitNetwork attack vector

Stored XSS via unescaped gallery shortcode attribute

Published Aug 6, 2026 · Updated Aug 6, 2026

Stored XSS in Philipp Bammes Slick Slider before 0.5.3 allows remote authenticated users to execute script via a gallery shortcode. The gallery renderer inserts the sl_asnavfor shortcode value into the single-quoted data-slick HTML attribute without escaping, so a quote terminates the attribute and injects an event handler. Contributor access and an existing media attachment are required, and the script runs only when another user views or previews the affected post.

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 Philipp Bammes Slick Slider before 0.5.3 allows remote authenticated users to execute script via a gallery shortcode. The gallery renderer inserts the sl_asnavfor shortcode value into the single-quoted data-slick HTML attribute without escaping, so a quote terminates the attribute and injects an event handler. Contributor access and an existing media attachment are required, and the script runs only when another user views or previews the affected post.

The record

CVE
CVE-2026-16537
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
Philipp Bammes
Product
Slick Slider
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 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 <0.5.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Philipp Bammes · Slick Sliderversion=0 <0.5.3

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.

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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 exploitPublished

Weakness, pattern, technique

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

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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