Post Snippets <= 4.0.19 - Authenticated (Administrator+) Stored Cross-Site Scripting via Import

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-7430
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-29 04:17:10 UTC
Updated2026-05-29 13:09:05 UTC
DescriptionThe Post Snippets plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 4.0.19. This is due to insufficient output escaping of imported snippet content when rendering JavaScript variables in the post editor. Specifically, the `jqueryUiDialog()` method in `WPEditor.php` embeds snippet content directly into JavaScript string literals without escaping double quotes (the quote-escaping code on line 214 is commented out). When snippets are imported via the Import/Export feature, the content bypasses WordPress's `wp_magic_quotes()` (which would otherwise add protective backslashes), allowing double quotes in snippet content to break out of the JavaScript string context. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary web scripts via a malicious import file that execute whenever any administrator accesses a post editor page. Please note that this does not affect single-site installations as administrators already have the `unfiltered_html` capability.

Risk And Classification

Primary CVSS: v3.1 4.4 MEDIUM from [email protected]

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

EPSS: 0.000390000 probability, percentile 0.120690000 (date 2026-05-31)

Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary4.4MEDIUMCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED4.4MEDIUMCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Saadiqbal Post Snippets Custom WordPress Code Snippets Customizer affected 4.0.19 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/post-snippets/trunk/src/PostSnippets/WPEditor.php [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/59dc2448-491c-478f-a784-c7270... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/post-snippets/tags/4.0.19/src/PostSnippets/DBTable.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/post-snippets/tags/4.1.1/src/PostSnippets/WPEditor.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/post-snippets/trunk/src/PostSnippets/DBTable.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/post-snippets/tags/4.1.1/src/PostSnippets/WPEditor.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/post-snippets/tags/4.0.19/src/PostSnippets/WPEditor.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/post-snippets/tags/4.1.1/src/PostSnippets/WPEditor.php [email protected] plugins.trac.wordpress.org
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: Albatross George (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-04-29T15:31:17.000ZVendor Notified
CNA2026-05-28T13:41:27.000ZDisclosed
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