CVE-2025-4126Network attack vector

Stored XSS via unescaped shortcode title attribute

Published May 15, 2025 · Updated Apr 8, 2026

Stored XSS in EG-Series 2.1.1 and earlier allows remote authenticated users to inject JavaScript through the [series] shortcode. The shortcode_title function places the user-controlled titletag attribute into page output without sufficient sanitization or output escaping. Contributor-level access and the Classic Editor plugin are required, and the script runs when a user visits the injected page.

CVSS severity6.4
Medium
EPSS probability0.27%
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 EG-Series 2.1.1 and earlier allows remote authenticated users to inject JavaScript through the [series] shortcode. The shortcode_title function places the user-controlled titletag attribute into page output without sufficient sanitization or output escaping. Contributor-level access and the Classic Editor plugin are required, and the script runs when a user visits the injected page.

The record

CVE
CVE-2025-4126
Published
May 15, 2025
Updated
Apr 8, 2026
Vendor
Emmanuel Georjon
Product
EG-Series
Classifications
CWE-80, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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 <=2.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Emmanuel Georjon · EG-Seriesversion=0 <=2.1.1

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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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