CVE-2025-13705Network attack vector

Stored XSS via unescaped shortcode class attribute

Published Dec 13, 2025 · Updated Dec 13, 2025

Stored XSS in blakelong Custom Frames 1.0.1 and earlier allows remote authenticated users to inject scripts via a crafted shortcode. The customframe shortcode handler inserts its class attribute into generated frame markup without adequate sanitization or attribute escaping. Contributor-level access is required; the script runs in a visitor's browser whenever the crafted page is viewed, enabling script execution in the site's origin.

CVSS severity6.4
Medium
EPSS probability0.22%
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 blakelong Custom Frames 1.0.1 and earlier allows remote authenticated users to inject scripts via a crafted shortcode. The customframe shortcode handler inserts its class attribute into generated frame markup without adequate sanitization or attribute escaping. Contributor-level access is required; the script runs in a visitor's browser whenever the crafted page is viewed, enabling script execution in the site's origin.

The record

CVE
CVE-2025-13705
Published
Dec 13, 2025
Updated
Dec 13, 2025
Vendor
blakelong
Product
Custom Frames
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 13, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 13, 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=* <=1.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

blakelong · Custom Framesversion=* <=1.0.1

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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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