CVE-2026-19698Network attack vectorHinoki check available

Contributor-level page defacement via stored CSS injection

Published Sep 2, 2026 · Updated Sep 2, 2026

Stored CSS injection in Roxnor GutenKit before 2.5.1 allows remote authenticated users to alter pages viewed by site visitors. The plugin accepts unvalidated, unescaped page settings and incorporates them into front-end CSS generated from page, block, and global-class styles. Contributor-level access is required; injected CSS can deface or visually redress pages and force external resource loads, but it cannot execute JavaScript.

CVSS severity3.5
Low
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stored CSS injection in Roxnor GutenKit before 2.5.1 allows remote authenticated users to alter pages viewed by site visitors. The plugin accepts unvalidated, unescaped page settings and incorporates them into front-end CSS generated from page, block, and global-class styles. Contributor-level access is required; injected CSS can deface or visually redress pages and force external resource loads, but it cannot execute JavaScript.

The record

CVE
CVE-2026-19698
Published
Sep 2, 2026
Updated
Sep 2, 2026
Vendor
Roxnor
Product
GutenKit
Classifications
CWE-74, T1491.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 2, 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 <2.5.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Roxnor · GutenKitversion=0 <2.5.1

Published CVSS scores

3.5WPScanCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/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 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-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1491.002External Defacement

Public exploit references

No public exploit references are available in this record.

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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