wpForo Forum <= 3.0.2 - Authenticated (Subscriber+) Arbitrary File Deletion via 'data[body][fileurl]' Parameter

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Summary

CVECVE-2026-5809
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-11 08:16:05 UTC
Updated2026-04-11 08:16:05 UTC
DescriptionThe wpForo Forum plugin for WordPress is vulnerable to Arbitrary File Deletion in versions up to and including 3.0.2. This is due to a two-step logic flaw: the topic_add() and topic_edit() action handlers accept arbitrary user-supplied data[*] arrays from $_REQUEST and store them as postmeta without restricting which fields may contain array values. Because 'body' is included in the allowed topic fields list, an attacker can supply data[body][fileurl] with an arbitrary file path (e.g., wp-config.php or an absolute server path). This poisoned fileurl is persisted to the plugin's custom postmeta database table. Subsequently, when the attacker submits wpftcf_delete[]=body on a topic_edit request, the add_file() method retrieves the stored postmeta record, extracts the attacker-controlled fileurl, passes it through wpforo_fix_upload_dir() which only rewrites legitimate wpforo upload paths and returns all other paths unchanged, and then calls wp_delete_file() on the unvalidated path. This makes it possible for authenticated attackers, with subscriber-level access and above, to delete arbitrary files writable by the PHP process on the server, including critical files such as wp-config.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H

Problem Types: CWE-73 | CWE-73 CWE-73 External Control of File Name or Path

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Tomdever WpForo Forum affected 3.0.2 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/wpforo/tags/3.0.2/classes/Actions.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wpforo/tags/3.0.2/classes/PostMeta.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wpforo/tags/3.0.2/classes/PostMeta.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wpforo/tags/3.0.2/includes/functions.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset/3503313/wpforo [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wpforo/tags/3.0.2/classes/Actions.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wpforo/tags/3.0.2/classes/Posts.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wpforo/tags/3.0.2/classes/PostMeta.php [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/0e46ac8d-89ee-4480-bb96-83f20... [email protected] www.wordfence.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Leonid Semenenko (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-04-08T15:17:23.000ZVendor Notified
CNA2026-04-10T18:51:03.000ZDisclosed
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