CVE-2023-48300Public exploitNetwork attack vector

Contributor-level stored XSS via unescaped shortcode attribute

Published Nov 20, 2023 · Updated Sep 4, 2024

Stored XSS in Epiphyt Embed Privacy before 1.8.1 allows remote authenticated users to inject scripts through an opt-out shortcode. The shortcode_opt_out method copies the show_all value directly into a data-show-all HTML attribute without constraining it to a Boolean or escaping it. Contributor-level access is sufficient to save a crafted post, and the injected JavaScript runs when another user opens and interacts with that page.

CVSS severity6.3
Medium
EPSS probability0.53%
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 Epiphyt Embed Privacy before 1.8.1 allows remote authenticated users to inject scripts through an opt-out shortcode. The shortcode_opt_out method copies the show_all value directly into a data-show-all HTML attribute without constraining it to a Boolean or escaping it. Contributor-level access is sufficient to save a crafted post, and the injected JavaScript runs when another user opens and interacts with that page.

The record

CVE
CVE-2023-48300
Published
Nov 20, 2023
Updated
Sep 4, 2024
Vendor
Epiphyt
Product
Embed Privacy
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=< 1.8.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Epiphyt · Embed Privacyversion=< 1.8.1

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
6.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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.

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 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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