CVE-2026-3454 | GenerateBlocks <= 2.2.0 - Insecure Direct Object Reference to Authenticated (Contributor+) Sensitive Information Exposure via Dynamic Tag Replacements

The GenerateBlocks plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.2.0. This is due to missing object-level authorization checks in the /wp-json/generateblocks/v1/dynamic-tag-replacements REST endpoint. The endpoint only verifies that the user has the edit_posts capability but does not verify the user has permission to access the specific post or its associated data referenced by attacker-controlled id parameters in dynamic tag content. This makes it possible for authenticated attackers, with Contributor-level access and above, to extract sensitive information from arbitrary posts including author email addresses and non-protected post meta values by crafting dynamic tag payloads such as {{post_meta id:<target>|key:<meta_key>}} and {{post_title id:<target>|link:author_email}}.

Published: 2026-05-05 Last update: 2026-05-05 Assigner: [email protected] Source: [email protected]
NVD Status：Deferred，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-3454 is rated Low Risk (26.9/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.01%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-3454

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-05 — 0.01% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-3454

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 3.6 [email protected]

Weakness enumeration for CVE-2026-3454

GitHub Security Advisory for CVE-2026-3454

GHSA-6288-wf2g-3fwm · Severity: medium — The GenerateBlocks plugin for WordPress is vulnerable to Insecure Direct Object Reference in all...

Affected software / configurations for CVE-2026-3454

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2026-3454

URL Tags
https://plugins.trac.wordpress.org/browser/generateblocks/tags/2.2.0/includes/class-meta-handler.php#L335
https://plugins.trac.wordpress.org/browser/generateblocks/tags/2.2.0/includes/dynamic-tags/class-dynamic-tag-callbacks.php#L364
https://plugins.trac.wordpress.org/browser/generateblocks/tags/2.2.0/includes/dynamic-tags/class-dynamic-tag-callbacks.php#L64
https://plugins.trac.wordpress.org/browser/generateblocks/tags/2.2.0/includes/dynamic-tags/class-dynamic-tags.php#L392
https://plugins.trac.wordpress.org/browser/generateblocks/tags/2.2.0/includes/dynamic-tags/class-dynamic-tags.php#L424
https://plugins.trac.wordpress.org/browser/generateblocks/tags/2.2.0/includes/dynamic-tags/class-dynamic-tags.php#L501
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3495827%40generateblocks%2Ftrunk&old=3415721%40generateblocks%2Ftrunk&sfp_email=&sfph_mail=
https://www.wordfence.com/threat-intel/vulnerabilities/id/0297d524-e016-4f8d-920c-d58c62edb2a0?source=cve
cvelogic Threat Intelligence