---
id: CVE-2025-52666
title: >-
  Improper neutralisation of format characters in the settings of Revive
  Adserver 5.5.2 and 6.0.1 and earlier versions causes an administrator user to
  disable the admin user console due to a fatal PHP error.
summary: >-
  Improper neutralisation of format characters in the settings of Revive
  Adserver 5.5.2 and 6.0.1 and earlier versions causes an administrator user to
  disable the admin user console due to a fatal PHP error.
severity: low
cvss: 2.7
cvssVector: 'CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-134
vendor: revive-adserver
product: revive_adserver
affected:
  - revive_adserver <= 5.5.2
  - 'revive_adserver >= 6.0.0, <= 6.0.1'
published: '2025-11-20'
updated: '2026-09-26'
sourceUpdated: '2026-09-26T00:10:00.127'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-52666'
references:
  - url: 'https://hackerone.com/reports/3399218'
    label: support@hackerone.com
  - url: 'https://hackerone.com/reports/3399218'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00422
epssPercentile: 0.34031
ingestedAt: '2026-09-26T00:22:39.978Z'
---

## Overview

Improper neutralisation of format characters in the settings of Revive Adserver 5.5.2 and 6.0.1 and earlier versions causes an administrator user to disable the admin user console due to a fatal PHP error.

## Affected

- `revive_adserver <= 5.5.2`
- `revive_adserver >= 6.0.0, <= 6.0.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.