CVE-2025-5352Public exploitNetwork attack vector

Stored XSS via unsanitized custom script injection

Published Aug 23, 2025 · Updated Aug 23, 2025

Stored XSS in Lunary before 1.9.25 allows attackers to execute JavaScript in users' browsers through a deployment environment variable. The Analytics component passes NEXT_PUBLIC_CUSTOM_SCRIPT to dangerouslySetInnerHTML without sanitization or validation. Exploitation requires control of the deployment environment or prior server compromise; every user who loads Analytics runs the persistent script in Lunary's origin.

CVSS severity9.6
Critical
EPSS probability0.50%
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 Lunary before 1.9.25 allows attackers to execute JavaScript in users' browsers through a deployment environment variable. The Analytics component passes NEXT_PUBLIC_CUSTOM_SCRIPT to dangerouslySetInnerHTML without sanitization or validation. Exploitation requires control of the deployment environment or prior server compromise; every user who loads Analytics runs the persistent script in Lunary's origin.

The record

CVE
CVE-2025-5352
Published
Aug 23, 2025
Updated
Aug 23, 2025
Vendor
Lunary
Product
Lunary
Classifications
CWE-79, T1203
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 23, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 23, 2025Record 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=unspecified <1.9.25

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Lunary · Lunaryversion=unspecified <1.9.25

Published CVSS scores

8.1huntr.devCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
9.6NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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
PrivilegesUnavailable
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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