CVE-2026-15249Public exploitNetwork attack vector

Contributor-level script execution via iframe source reconstruction

Published Aug 12, 2026 · Updated Aug 12, 2026

Stored XSS in Sparkle WP Patterns Kit 1.0.3 and earlier allows remote authenticated users to execute script in a victim's browser. The front-end video-popup handler decodes an entity-encoded href and concatenates it into an iframe src HTML string without escaping, letting a quote terminate the attribute and create an onload handler. Contributor access can store the payload, but execution requires a viewer to open the content and click the play button; the script then runs in that viewer's WordPress origin.

CVSS severity5.4
Medium
EPSS probability0.16%
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 Sparkle WP Patterns Kit 1.0.3 and earlier allows remote authenticated users to execute script in a victim's browser. The front-end video-popup handler decodes an entity-encoded href and concatenates it into an iframe src HTML string without escaping, letting a quote terminate the attribute and create an onload handler. Contributor access can store the payload, but execution requires a viewer to open the content and click the play button; the script then runs in that viewer's WordPress origin.

The record

CVE
CVE-2026-15249
Published
Aug 12, 2026
Updated
Aug 12, 2026
Vendor
Sparkle Themes
Product
Patterns Kit
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 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 <=1.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Sparkle Themes · Patterns Kitversion=0 <=1.0.3

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 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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