CVE-2026-15644Network attack vector

Stored XSS via unvalidated separator style attribute

Published Aug 1, 2026 · Updated Aug 1, 2026

Stored XSS in Code Supply Co. Powerkit 3.1.0 and earlier allows remote authenticated users to inject scripts through a shortcode. The Separator shortcode inserts its style attribute into a CSS border-style declaration without validating the value against permitted styles. Contributor-level access is required to save the crafted shortcode; the payload executes when visitors render the affected page.

CVSS severity6.4
Medium
EPSS probability0.20%
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 Code Supply Co. Powerkit 3.1.0 and earlier allows remote authenticated users to inject scripts through a shortcode. The Separator shortcode inserts its style attribute into a CSS border-style declaration without validating the value against permitted styles. Contributor-level access is required to save the crafted shortcode; the payload executes when visitors render the affected page.

The record

CVE
CVE-2026-15644
Published
Aug 1, 2026
Updated
Aug 1, 2026
Vendor
Code Supply Co.
Product
Powerkit
Classifications
CWE-79, CAPEC-592
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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 <=3.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Code Supply Co. · Powerkitversion=0 <=3.1.0

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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-592Stored XSS

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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