CVE-2026-23525Network attack vector

Stored XSS via unsanitized README previews

Published Jan 18, 2026 · Updated Jan 18, 2026

Stored XSS in the App Store of 1Panel-dev 1Panel before 1.10.34-lts and 1Panel 2.0.0 through 2.0.16 allows attackers to run browser scripts. The App Store passes application README content to the previewOnly MdEditor renderer without XSS sanitization, so embedded script executes when details are viewed. Attackers must be able to publish a malicious application and induce an authenticated panel user to view its details, exposing that user's session data and permitted panel actions.

CVSS severity6.4
Medium
EPSS probability0.36%
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 the App Store of 1Panel-dev 1Panel before 1.10.34-lts and 1Panel 2.0.0 through 2.0.16 allows attackers to run browser scripts. The App Store passes application README content to the previewOnly MdEditor renderer without XSS sanitization, so embedded script executes when details are viewed. Attackers must be able to publish a malicious application and induce an authenticated panel user to view its details, exposing that user's session data and permitted panel actions.

The record

CVE
CVE-2026-23525
Published
Jan 18, 2026
Updated
Jan 18, 2026
Vendor
KubeOperator
Product
1Panel
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 18, 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=< 1.10.34
  2. Affected versionversion=>= 2.0.0, < 2.0.17

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

KubeOperator · 1Panelversion=< 1.10.34; version=>= 2.0.0, < 2.0.17

Published CVSS scores

8.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
6.4GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

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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