CVE-2026-4077Public exploitNetwork attack vector

Stored XSS via unescaped ecover shortcode ID

Published Mar 21, 2026 · Updated Mar 21, 2026

Stored XSS in Ecover Builder For Dummies 1.0 and earlier allows remote authenticated users to inject scripts through an ecover shortcode. The ecover shortcode handler in plugin_builder.php places its user-supplied id attribute into generated page output without sanitization or escaping. Contributor-level access is required to store the payload in a post or page, and the script runs when a user visits the injected content.

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 Ecover Builder For Dummies 1.0 and earlier allows remote authenticated users to inject scripts through an ecover shortcode. The ecover shortcode handler in plugin_builder.php places its user-supplied id attribute into generated page output without sanitization or escaping. Contributor-level access is required to store the payload in a post or page, and the script runs when a user visits the injected content.

The record

CVE
CVE-2026-4077
Published
Mar 21, 2026
Updated
Mar 21, 2026
Vendor
Miguel Martinez Lopez
Product
Ecover Builder For Dummies
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 21, 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=* <=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Miguel Martinez Lopez · Ecover Builder For Dummiesversion=* <=1.0

Published CVSS scores

5.5TenableAV:N/AC:L/Au:S/C:P/I:P/A:N
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 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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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