CVE-2025-53239Network attack vector

Reflected XSS via undisclosed page-generation input

Published Nov 6, 2025 · Updated Nov 6, 2025

Reflected XSS in bnovotny User Registration Aide 1.5.3.8 and earlier allows remote attackers to execute script via crafted requests. The CNA and Patchstack do not disclose the affected parameter or code path, only that untrusted input reaches generated page output without adequate neutralization. Exploitation requires a user to open the crafted page, causing script execution in that user's browser context with limited data access or modification.

CVSS severity7.1
High
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

Reflected XSS in bnovotny User Registration Aide 1.5.3.8 and earlier allows remote attackers to execute script via crafted requests. The CNA and Patchstack do not disclose the affected parameter or code path, only that untrusted input reaches generated page output without adequate neutralization. Exploitation requires a user to open the crafted page, causing script execution in that user's browser context with limited data access or modification.

The record

CVE
CVE-2025-53239
Published
Nov 6, 2025
Updated
Nov 6, 2025
Vendor
bnovotny
Product
User Registration Aide
Classifications
CWE-79, CAPEC-591, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 6, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a <=<= 1.5.3.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

bnovotny · User Registration Aideversion=n/a <=<= 1.5.3.8

Published CVSS scores

7.1PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-591Reflected XSS
T1203Exploitation for Client Execution

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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