CVE-2026-4030: Arbitrary File Access in Database Backup for WordPress
Platform
wordpress
Component
wp-db-backup
Opgelost in
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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Impact en Aanvalsscenarioswordt vertaald…
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.
Uitbuitingscontextwordt vertaald…
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.
Dreigingsinformatie
Exploit Status
CISA SSVC
CVSS-vector
Wat betekenen deze metrics?
- Attack Vector
- Netwerk — op afstand uitbuitbaar via internet. Geen fysieke of lokale toegang vereist.
- Attack Complexity
- Hoog — vereist een race condition, niet-standaard configuratie of specifieke omstandigheden.
- Privileges Required
- Geen — geen authenticatie vereist om te exploiteren.
- User Interaction
- Geen — automatische en stille aanval. Slachtoffer doet niets.
- Scope
- Ongewijzigd — impact beperkt tot het kwetsbare component.
- Confidentiality
- Hoog — volledig verlies van vertrouwelijkheid. Aanvaller kan alle gegevens lezen.
- Integrity
- Hoog — aanvaller kan alle gegevens schrijven, aanpassen of verwijderen.
- Availability
- Hoog — volledige crash of uitputting van resources. Totale denial of service.
Getroffen Software
Zwakheidsclassificatie (CWE)
Tijdlijn
- Gereserveerd
- Gepubliceerd
Mitigatie en Workaroundswordt vertaald…
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.
Hoe te verhelpen
Update naar versie 2.5.3, of een nieuwere gepatchte versie
Veelgestelde vragenwordt vertaald…
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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