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VulnerabilityPublished

CVE-2026-86783: Post Grid Gutenberg Blocks (WordPress plugin) · Information Exposure

Affects Post Grid Gutenberg Blocks (WordPress plugin)Source CVE Database V5

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Not known to be exploited · CVSS 5.3 Medium : upgrade to 5.0.41 when convenient.

Data as of 7 Nov 2026, 23:24 UTC

CVSS 3.1 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 28% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 5.0.41
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 23 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 7 Nov 2026.

What to do

Upgrade Post Grid Gutenberg Blocks (WordPress plugin) to 5.0.41.

Affected software

ProductAffectedFixed in
Post Grid Gutenberg BlocksAffected
  • <5.0.41
Fixed in
  • 5.0.41

AI-suggested

Upgrade the Post Grid Gutenberg Blocks plugin to version 5.0.41 or later, where this vulnerability has been fixed. Since the vulnerability is addressed in this version, applying the official update is the recommended remediation.

Description

The Post Grid Gutenberg Blocks WordPress plugin before 5.0.41 does not perform an authorization or post-visibility check on a REST API route that returns the custom field keys of a given post, allowing unauthenticated users to disclose the custom field key names of arbitrary posts, including private, draft, pending, scheduled and password-protected posts.

References

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