Custom Block Builder – Lazy Blocks <= 4.2.0 - Execução Remota de Código Autenticada (Colaborador+)
Plataforma
wordpress
Componente
lazy-blocks
Corrigido em
4.2.1
CVE-2026-1560 is a Remote Code Execution (RCE) vulnerability affecting the Custom Block Builder – Lazy Blocks plugin for WordPress. This vulnerability allows authenticated attackers, possessing Contributor-level access or higher, to execute arbitrary code on the server. The vulnerability impacts versions 0.0.0 through 4.2.0, and a patch is available in version 4.2.1.
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Impacto e Cenários de Ataquetraduzindo…
The impact of this vulnerability is significant due to the potential for remote code execution. An attacker with Contributor access can leverage this flaw to gain complete control over the WordPress server, potentially leading to data breaches, website defacement, malware installation, and further compromise of the network. The attacker could exfiltrate sensitive data, modify website content, or use the server as a launchpad for attacks against other systems. This vulnerability shares similarities with other WordPress plugin vulnerabilities where insufficient input validation allows for code injection.
Contexto de Exploraçãotraduzindo…
CVE-2026-1560 was publicly disclosed on 2026-02-11. The vulnerability’s ease of exploitation, combined with the prevalence of WordPress, suggests a moderate exploitation probability. No public proof-of-concept (POC) code has been released at the time of writing, but the vulnerability's nature makes it likely that one will emerge. It is not currently listed on the CISA KEV catalog.
Quem Está em Riscotraduzindo…
WordPress websites utilizing the Custom Block Builder – Lazy Blocks plugin, particularly those with multiple contributors or users with elevated privileges, are at significant risk. Shared hosting environments where plugin updates are not consistently managed are also particularly vulnerable.
Passos de Detecçãotraduzindo…
• wordpress / composer / npm:
grep -r 'LazyBlocks_Blocks' /var/www/html/wp-content/plugins/• wordpress / composer / npm:
wp plugin list --status=inactive | grep 'Custom Block Builder – Lazy Blocks'• wordpress / composer / npm:
wp plugin list --status=active | grep 'Custom Block Builder – Lazy Blocks' && wp plugin version 'Custom Block Builder – Lazy Blocks'Linha do Tempo do Ataque
- Disclosure
disclosure
Inteligência de Ameaças
Status do Exploit
EPSS
0.13% (percentil 32%)
CISA SSVC
Vetor CVSS
O que significam essas métricas?
- Attack Vector
- Rede — explorável remotamente pela internet. Sem acesso físico ou local necessário.
- Attack Complexity
- Baixa — sem condições especiais. O atacante pode explorar de forma confiável.
- Privileges Required
- Baixo — qualquer conta de usuário válida é suficiente.
- 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
Informações do pacote
- Instalações ativas
- 20KNicho
- Avaliação do plugin
- 4.9
- Requer WordPress
- 6.2+
- Compatível até
- 7.0
- Requer PHP
- 8.0+
Classificação de Fraqueza (CWE)
Linha do tempo
- Reservado
- Publicada
- Modificada
- EPSS atualizado
Mitigação e Soluções Alternativastraduzindo…
The primary mitigation is to immediately upgrade the Custom Block Builder – Lazy Blocks plugin to version 4.2.1 or later. If upgrading is not immediately feasible, consider implementing temporary workarounds. These include implementing strict Web Application Firewall (WAF) rules to filter potentially malicious requests targeting the vulnerable functions within the 'LazyBlocks_Blocks' class. Thorough code review of the plugin's codebase can also help identify and block suspicious patterns. After upgrading, confirm the fix by attempting to trigger the vulnerable code paths and verifying that they are now properly sanitized.
Como corrigir
Atualize para a versão 4.2.1, ou uma versão corrigida mais recente
Boletim de Segurança CVE
Análise de vulnerabilidades e alertas críticos diretamente no seu e-mail.
Perguntas frequentestraduzindo…
What is CVE-2026-1560 — RCE in Custom Block Builder – Lazy Blocks?
CVE-2026-1560 is a Remote Code Execution vulnerability affecting the Custom Block Builder – Lazy Blocks WordPress plugin, allowing authenticated attackers to execute code on the server.
Am I affected by CVE-2026-1560 in Custom Block Builder – Lazy Blocks?
You are affected if you are using Custom Block Builder – Lazy Blocks versions 0.0.0 through 4.2.0. Upgrade immediately.
How do I fix CVE-2026-1560 in Custom Block Builder – Lazy Blocks?
Upgrade the plugin to version 4.2.1 or later. As a temporary measure, implement WAF rules and code review.
Is CVE-2026-1560 being actively exploited?
While no active exploitation has been confirmed, the vulnerability's nature makes it likely that exploitation attempts will occur.
Where can I find the official Custom Block Builder advisory for CVE-2026-1560?
Refer to the plugin developer's website or WordPress plugin repository for the latest advisory and update information.
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