Save as PDF Plugin by PDFCrowd <= 4.6.1 - Authenticated (Contributor+) Arbitrary Function Invocation / Code Injection via 'pdf_created_callback' Shortcode Attribute

Summary

CVE	CVE-2026-92807
State	PUBLISHED
Assigner	Wordfence
Source Priority	CVE Program / NVD first with legacy fallback
Published	2026-09-19 03:17:17 UTC
Updated	2026-09-19 03:17:17 UTC
Description	The Save as PDF Plugin by PDFCrowd plugin for WordPress is vulnerable to Arbitrary Function Invocation in all versions up to, and including, 4.6.1 via the `pdf_created_callback` shortcode attribute. The `eval_shortcode()` function copies any non-`button_`/non-`email_` shortcode attribute verbatim into a custom options array without sanitization, allowlist enforcement, or capability checks, and `create_button()` AES-encrypts that array — including the attacker-supplied callback value — and embeds the resulting blob in the rendered button HTML; when the blob is later POSTed to the unauthenticated `wp_ajax_nopriv_save_as_pdf_pdfcrowd` endpoint, `save_as_pdf_pdfcrowd()` decrypts it and invokes `$options['pdf_created_callback']` as a PHP callable at line 1722 with no `is_callable()` guard, no allowlist, and no capability check. This makes it possible for authenticated attackers, with Contributor-level access and above, to invoke arbitrary PHP functions or static class methods with plugin option data as the sole argument, enabling disclosure of the site's stored PDFCrowd API key and username or further server-side abuse. Note that the encryption boundary does not mitigate this vector because the server itself encrypts the attacker-chosen callback during shortcode rendering, supplying any authenticated Contributor with a cryptographically valid blob that any unauthenticated visitor can subsequently replay to trigger invocation.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

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

Problem Types: CWE-94 | CWE-94 CWE-94 Improper Control of Generation of Code ('Code Injection')

Version	Source	Type	Score	Severity	Vector
3.1	[email protected]	Primary	8.8	HIGH	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
3.1	CNA	DECLARED	8.8	HIGH	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`

CVSS v3.1 Breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

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

Vendor Declared Affected Products

Source	Vendor	Product	Version	Platforms
CNA	Pdfcrowd	Save As PDF Plugin By PDFCrowd	affected 4.6.1 semver	Not specified

References

Reference	Source	Link	Tags
plugins.trac.wordpress.org/browser/save-as-pdf-by-pdfcrowd/tags/4.6.1/public/class-save-...	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/save-as-pdf-by-pdfcrowd/tags/4.6.1/public/class-save-...	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/save-as-pdf-by-pdfcrowd/tags/4.6.1/public/class-save-...	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/save-as-pdf-by-pdfcrowd/tags/4.6.1/public/class-save-...	[email protected]	plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/fc87f440-d26e-4535-afe4-c4a97...	[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: Wordfence PRISM (en)

Additional Advisory Data

Source	Time	Event
CNA	2026-09-17T12:04:01.000Z	Vendor Notified
CNA	2026-09-18T14:00:21.000Z	Disclosed

There are currently no legacy QID mappings associated with this CVE.