CVE-2025-3516Public exploitNetwork attack vector

Stored XSS via unescaped lightbox caption attribute

Published May 16, 2025 · Updated May 16, 2025

Stored XSS in Archetyped Simple Lightbox before 2.9.4 allows remote authenticated users to execute scripts through crafted post links. The plugin copies the data-slb-caption DOM attribute into lightbox output without escaping special characters, so an embedded image error handler executes. Contributor access can store the payload, but another user must click the crafted link; the script then runs in that visitor's browser.

CVSS severity5.9
Medium
EPSS probability0.30%
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 Archetyped Simple Lightbox before 2.9.4 allows remote authenticated users to execute scripts through crafted post links. The plugin copies the data-slb-caption DOM attribute into lightbox output without escaping special characters, so an embedded image error handler executes. Contributor access can store the payload, but another user must click the crafted link; the script then runs in that visitor's browser.

The record

CVE
CVE-2025-3516
Published
May 16, 2025
Updated
May 16, 2025
Vendor
Archetyped
Product
Simple Lightbox
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 16, 2025CVE publishedPublication date reported by the CVE source.
  2. May 16, 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=0 <2.9.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Archetyped · Simple Lightboxversion=0 <2.9.4

Published CVSS scores

5.9CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/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 exploitPublished

Weakness, pattern, technique

CWE-79Cross-Site Scripting (XSS)
T1203Exploitation for Client Execution

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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