CVE-2025-12379Public exploitNetwork attack vector

Stored XSS via unvalidated Modern Heading tags

Published Jan 10, 2026 · Updated Jan 10, 2026

Stored XSS in Averta Phlox Core Elements 2.17.13 and earlier allows remote authenticated users to inject scripts through Modern Heading tags. The ModernHeading render method uses the title_tag and title_tag_secondary settings directly as HTML element names without enforcing its configured allowlist. Contributor-level access to edit Elementor content is sufficient, and the stored script executes in a visitor's browser when the crafted page is viewed.

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 Averta Phlox Core Elements 2.17.13 and earlier allows remote authenticated users to inject scripts through Modern Heading tags. The ModernHeading render method uses the title_tag and title_tag_secondary settings directly as HTML element names without enforcing its configured allowlist. Contributor-level access to edit Elementor content is sufficient, and the stored script executes in a visitor's browser when the crafted page is viewed.

The record

CVE
CVE-2025-12379
Published
Jan 10, 2026
Updated
Jan 10, 2026
Vendor
Averta
Product
Phlox Core Elements
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 10, 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=* <=2.17.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Averta · Phlox Core Elementsversion=* <=2.17.13

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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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