Greenshift <= 12.8.3 - Missing Authorization to Unauthenticated Private Reusable Block Disclosure via 'gspb_el_reusable_load'

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Summary

CVECVE-2026-2371
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-07 00:16:13 UTC
Updated2026-04-22 21:27:27 UTC
DescriptionThe Greenshift – animation and page builder blocks plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 12.8.3. This is due to missing authorization and post status validation in the `gspb_el_reusable_load()` AJAX handler. The handler accepts an arbitrary `post_id` parameter and renders the content of any `wp_block` post without checking `current_user_can('read_post', $post_id)` or verifying the post status. Combined with the nonce being exposed to unauthenticated users on any public page using the `[wp_reusable_render]` shortcode with `ajax="1"`, this makes it possible for unauthenticated attackers to retrieve the rendered HTML content of private, draft, or password-protected reusable blocks.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

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

EPSS: 0.000130000 probability, percentile 0.022330000 (date 2026-04-22)

Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Wpsoul Greenshift Animation And Page Builder Blocks affected 12.8.3 semver Not specified

References

ReferenceSourceLinkTags
www.wordfence.com/threat-intel/vulnerabilities/id/52632b50-9755-4ebd-a1a8-587cc... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/greenshift-animation-and-page-builder-blocks/trunk/se... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/greenshift-animation-and-page-builder-blocks/tags/12.... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset/3465111/greenshift-animation-and-page-builder-block... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/greenshift-animation-and-page-builder-blocks/tags/12.... [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: Lucas Montes (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-02-11T20:55:45.000ZVendor Notified
CNA2026-03-06T11:20:33.000ZDisclosed
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