CVE-2026-10818 json
WPForms Pro <= 1.10.1.1 - Unauthenticated Arbitrary File Write via Chunked Upload Init/Finalize Ordering
published 2026-07-25 3 mo ago modified 2026-07-27 3 mo ago also EUVD-2026-48766
- cvss
- 8.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.5%
- EPSS 2.5% chance of exploitation in 30 days, percentile 84%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
The WPForms Pro plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.10.1.1 via the ajax_chunk_upload_finalize function. This is due to the file type validation occurring after chunk metadata and file contents have already been written to disk, and the assembled file not being deleted upon validation failure. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 3 mo ago
Exploit prediction
2.48% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template WPForms Pro <= 1.10.1.1 - Unauthenticated Arbitrary File Upload nuclei detection template
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- WPForms WPForms Pro
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
- Technology feeds
References
Sources
- CVE List CVE-2026-10818
- NVD CVE-2026-10818
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.