CVE-2026-5809
wpForo Forum <= 3.0.2 - Authenticated (Subscriber+) Arbitrary File Deletion via 'data[body][fileurl]' Parameter
- 7.1HighCVSS base score
- 0.51%Exploitation in 30 daysEPSS · top 56% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
The 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.
Timeline
ID reserved
By Wordfence
- 3 days later
· 3 days later
Published
- 2 days later
· 2 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WordfenceCNA (assigner) | 3.1 | High7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H |
| NVDNVD · Deferred | 3.1 | High7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.51% · top 56% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.
Affected products
- affected ≤ 3.0.2
References
References9
- https://www.wordfence.com/threat-intel/vulnerabilities/id/0e46ac8d-89ee-4480-bb96-83f2044a4323?source=cve (opens in a new tab)
- https://plugins.trac.wordpress.org/changeset/3503313/wpforo (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/wpforo/tags/3.0.2/classes/Actions.php#L746 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/wpforo/tags/3.0.2/classes/Actions.php#L761 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/wpforo/tags/3.0.2/classes/Posts.php#L1961 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/wpforo/tags/3.0.2/classes/PostMeta.php#L523 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/wpforo/tags/3.0.2/classes/PostMeta.php#L421 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/wpforo/tags/3.0.2/classes/PostMeta.php#L402 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/wpforo/tags/3.0.2/includes/functions.php#L2641 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-21676 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-5809)Record last updated .