CVE-2026-4030: Arbitrary File Access in Database Backup for WordPress
Plataforma
wordpress
Componente
wp-db-backup
Corrigido em
2.5.3
CVE-2026-4030 describes an Arbitrary File Access vulnerability discovered in the Database Backup for WordPress plugin. This flaw allows unauthenticated attackers to read and delete files on the server, potentially leading to sensitive information exposure and complete site compromise. The vulnerability affects versions 1.0.0 through 2.5.2 of the plugin, and a fix is available in version 2.5.3.
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Impacto e Cenários de Ataquetraduzindo…
The impact of CVE-2026-4030 is significant, particularly within WordPress Multisite environments. An attacker exploiting this vulnerability can gain unauthorized access to sensitive files, including configuration files, database credentials, and potentially even source code. Successful exploitation could lead to the disclosure of confidential data, modification of website content, or even complete site takeover. The ability to delete arbitrary files further exacerbates the risk, potentially disrupting website operations and causing data loss. This vulnerability shares similarities with other file access vulnerabilities where improper authorization checks allow attackers to bypass security controls.
Contexto de Exploraçãotraduzindo…
CVE-2026-4030 was published on 2026-05-14. Its severity is rated HIGH (CVSS 8.1). Public proof-of-concept (POC) code is currently unknown, but the vulnerability's nature suggests it could be easily exploited. The vulnerability is specifically exploitable in WordPress Multisite environments. There is no indication of active exploitation campaigns at this time, but the ease of exploitation warrants immediate attention and patching.
Inteligência de Ameaças
Status do Exploit
Vetor CVSS
O que significam essas métricas?
- Attack Vector
- Rede — explorável remotamente pela internet. Sem acesso físico ou local necessário.
- Attack Complexity
- Alta — exige condição de corrida, configuração não padrão ou circunstâncias específicas.
- Privileges Required
- Nenhum — sem autenticação necessária para explorar.
- User Interaction
- Nenhuma — ataque automático e silencioso. A vítima não faz nada.
- Scope
- Inalterado — impacto limitado ao componente vulnerável.
- Confidentiality
- Alto — perda total de confidencialidade. O atacante pode ler todos os dados.
- Integrity
- Alto — o atacante pode escrever, modificar ou excluir qualquer dado.
- Availability
- Alto — falha completa ou esgotamento de recursos. Negação de serviço total.
Software Afetado
Classificação de Fraqueza (CWE)
Linha do tempo
- Reservado
- Publicada
- Modificada
Mitigação e Soluções Alternativastraduzindo…
The primary mitigation for CVE-2026-4030 is to immediately upgrade the Database Backup for WordPress plugin to version 2.5.3 or later. If upgrading is not immediately feasible due to compatibility issues or breaking changes, consider implementing a temporary workaround by restricting access to the plugin's backup directory. This can be achieved through file system permissions or web server configuration. While not a complete solution, this can limit the attacker's ability to read or delete files. Monitor WordPress logs for any unusual file access attempts, particularly those originating from unauthenticated users. After upgrading, verify the fix by attempting to access a non-public file through the plugin's interface; access should be denied.
Como corrigir
Atualize para a versão 2.5.3, ou uma versão corrigida mais recente
Perguntas frequentestraduzindo…
What is CVE-2026-4030 — Arbitrary File Access in Database Backup for WordPress?
CVE-2026-4030 is a HIGH severity vulnerability in the Database Backup for WordPress plugin allowing unauthenticated attackers to read and delete files. It affects versions 1.0.0–2.5.2, potentially leading to sensitive information exposure and site takeover.
Am I affected by CVE-2026-4030 in Database Backup for WordPress?
You are affected if you are using the Database Backup for WordPress plugin in versions 1.0.0 through 2.5.2, especially if you are running a WordPress Multisite environment.
How do I fix CVE-2026-4030 in Database Backup for WordPress?
Upgrade the Database Backup for WordPress plugin to version 2.5.3 or later. As a temporary workaround, restrict access to the plugin's backup directory through file system permissions or web server configuration.
Is CVE-2026-4030 being actively exploited?
There is currently no indication of active exploitation campaigns, but the vulnerability's ease of exploitation warrants immediate attention and patching.
Where can I find the official Database Backup for WordPress advisory for CVE-2026-4030?
Refer to the official Database Backup for WordPress plugin website or WordPress.org plugin page for the latest advisory and update information regarding CVE-2026-4030.
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