CVE-2026-109370 json
Document Embedder <= 2.4.0 - Authenticated (Contributor+) Stored DOM-Based Cross-Site Scripting via 'documentSource.doc' Block Attribute
published 12d ago modified 12d ago also EUVD-2026-111607
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 12%
- public exploits
- 0
- none known
Summary
The Document Embedder – let visitors read files without downloading plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via the 'content (post_content containing block JSON documentSource.doc)' parameter in all versions up to, and including, 2.4.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The payload is triggered specifically when the victim clicks the embedded document's Download button, which causes the de_track_download AJAX fallback path to programmatically create an anchor with the attacker-controlled href and call .click() — a condition reached because supplying docId=0 causes can_read_document() to return false, bypassing the normal download flow.
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 12d ago
Exploit prediction
0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- bplugins Document Embedder – let visitors read files without downloading
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/ad7f7459-943f-42de-b14a-34c8c24763e1?source=cve
- plugins.trac.wordpress.org /browser/document-emberdder/tags/2.4.0/build/blocks/document-embed/view.js
- plugins.trac.wordpress.org /browser/document-emberdder/tags/2.4.0/build/blocks/document-embed/render.php#L92
- plugins.trac.wordpress.org /browser/document-emberdder/tags/2.4.0/includes/features/class-bplde-ajaxcall.php#L289
- plugins.trac.wordpress.org /browser/document-emberdder/tags/2.4.0/includes/core/class-bplde-helper-functions.php#L182
- plugins.trac.wordpress.org /changeset/3751444/document-emberdder/trunk
- plugins.trac.wordpress.org /changeset?reponame=&new=3751444%40document-emberdder%2Ftags%2F2.4.1&old=3731835%40document-emberdder%2Ftags%2
Sources
- CVE List CVE-2026-109370
- NVD CVE-2026-109370
Fencer Intel 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.