CVE-2023-4799Public exploitNetwork attack vector

Contributor-level stored XSS via unescaped shortcode attributes

Published Nov 20, 2023 · Updated Sep 4, 2024

Stored XSS in Magic Embeds before 3.1.2 allows remote authenticated users to execute script through crafted shortcode attributes. The fb_plugin video shortcode inserts unvalidated autoplay and width values into page output without escaping, allowing event-handler markup to persist. Contributor-level access is required to store the payload, and script executes when another user views the affected page or post.

CVSS severity5.4
Medium
EPSS probability0.43%
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 Magic Embeds before 3.1.2 allows remote authenticated users to execute script through crafted shortcode attributes. The fb_plugin video shortcode inserts unvalidated autoplay and width values into page output without escaping, allowing event-handler markup to persist. Contributor-level access is required to store the payload, and script executes when another user views the affected page or post.

The record

CVE
CVE-2023-4799
Published
Nov 20, 2023
Updated
Sep 4, 2024
Vendor
Miguel Sirvent
Product
Magic Embeds
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 20, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 2024Record 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 <3.1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Miguel Sirvent · Magic Embedsversion=0 <3.1.2

Published CVSS scores

5.4NIST NVDCVSS: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

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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