● Medium · CVSS 5.3

How to Fix CVE-2026-2371: Missing authorization in Greenshift – animation and page builder blocks

Q: What is the CVSS score for CVE-2026-2371?

5.3 (Medium). Vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`.

Q: Where is the official advisory for CVE-2026-2371?

The vendor advisory is at [https://www.wordfence.com/threat-intel/vulnerabilities/id/52632b50-9755-4ebd-a1a8-587cc633debb?source=cve](https://www.wordfence.com/threat-intel/vulnerabilities/id/52632b50-9755-4ebd-a1a8-587cc633debb?source=cve). The NVD record is at https://nvd.nist.gov/vuln/detail/CVE-2026-2371.

By Sai Kiran Pandrala. Last verified: 2026-05-25.

CVE-2026-2371 is a missing authorization in wpsoul Greenshift – animation and page builder blocks. The fix is to apply the vendor patch noted below.

⚡ At a glance


Severity	5.3 (Medium)
Actively exploited?	No public listing in CISA KEV
Affected	Greenshift – animation and page builder blocks 0 to <=12.8.3
Fixed in	See vendor advisory
Type (CWE)	CWE-862 Missing Authorization

What is CVE-2026-2371?

The 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. The CVSS base score is 5.3 (Medium). The official advisory is at https://www.wordfence.com/threat-intel/vulnerabilities/id/52632b50-9755-4ebd-a1a8-587cc633debb?source=cve.

Am I affected?

Check the version of Greenshift – animation and page builder blocks you are running and compare it against the Affected row above (Greenshift – animation and page builder blocks 0 to <=12.8.3). If your build sits inside the affected range, you must patch.

Run the version check that fits your platform:


# Linux package check
dpkg -s greenshift-animation-and-page-builder-blocks 2>/dev/null | grep -i ^Version
rpm -q greenshift-animation-and-page-builder-blocks 2>/dev/null
command -v greenshift-animation-and-page-builder-blocks >/dev/null && greenshift-animation-and-page-builder-blocks --version 2>/dev/null


# Windows (PowerShell)
Get-Package -Name "*Greenshift – animation and page builder blocks*" -ErrorAction SilentlyContinue | Select-Object Name, Version
winget list --name "Greenshift – animation and page builder blocks" 2>$null

How to fix CVE-2026-2371

Upgrade Greenshift – animation and page builder blocks to a patched build: See vendor advisory. The vendor advisory is the source of truth for the exact fixed version.

Ubuntu / Debian


sudo apt-get update
sudo apt-get install --only-upgrade greenshift-animation-and-page-builder-blocks
dpkg -s greenshift-animation-and-page-builder-blocks | grep -i ^Version

RHEL / CentOS / Rocky / AlmaLinux


sudo dnf upgrade --refresh greenshift-animation-and-page-builder-blocks -y
# or for older releases:
sudo yum update greenshift-animation-and-page-builder-blocks -y
rpm -q greenshift-animation-and-page-builder-blocks

SUSE / openSUSE


sudo zypper refresh
sudo zypper update greenshift-animation-and-page-builder-blocks
rpm -q greenshift-animation-and-page-builder-blocks

PHP / Composer


composer update wpsoul/greenshift-animation-and-page-builder-blocks 2>/dev/null || composer update
composer show | head -20

WordPress


# Update via WP-CLI
wp plugin update --all
wp core update

Complete PowerShell remediation script (Windows)


# Fix script for CVE-2026-2371 affecting Greenshift – animation and page builder blocks
# Run as administrator. Detect -> backup -> upgrade -> verify -> log.

$ErrorActionPreference = "Stop"
$LogPath  = "C:\Logs\CVE-2026-2371-fix-$(Get-Date -Format yyyyMMdd-HHmmss).log"
New-Item -ItemType Directory -Force (Split-Path $LogPath) | Out-Null
Start-Transcript -Path $LogPath -Append

try {
    Write-Host "[1/4] Detect installed version"
    $pkg = Get-Package -Name "*Greenshift – animation and page builder blocks*" -ErrorAction SilentlyContinue
    if ($pkg) { $pkg | Format-Table Name, Version }
    else { Write-Host "Not detected via Get-Package; try winget list" }

    Write-Host "[2/4] Backup configuration"
    $backup = "C:\Backup\greenshift-animation-and-page-builder-blocks-$(Get-Date -Format yyyyMMdd)"
    New-Item -ItemType Directory -Force $backup | Out-Null
    Get-ChildItem "C:\ProgramData\Greenshift – animation and page builder blocks" -ErrorAction SilentlyContinue |
        Copy-Item -Destination $backup -Recurse -Force -ErrorAction SilentlyContinue

    Write-Host "[3/4] Apply the upgrade to See vendor advisory"
    winget upgrade --name "Greenshift – animation and page builder blocks" --silent --accept-source-agreements --accept-package-agreements
    if ($LASTEXITCODE -ne 0) {
        # Fallback: pull latest via OS update channel
        Install-Module -Name PSWindowsUpdate -Force -SkipPublisherCheck -ErrorAction SilentlyContinue
        Import-Module PSWindowsUpdate
        Install-WindowsUpdate -MicrosoftUpdate -AcceptAll -IgnoreReboot
    }

    Write-Host "[4/4] Verify the patched build"
    winget list --name "Greenshift – animation and page builder blocks"
    Write-Host "Patch applied. Reboot if prompted."
    exit 0
} catch {
    Write-Error "Patch failed: $_"
    exit 1
} finally {
    Stop-Transcript
}

Complete Bash remediation script (Linux)


#!/usr/bin/env bash
# Fix script for CVE-2026-2371 affecting Greenshift – animation and page builder blocks
# Detect -> backup -> upgrade -> verify -> log.

set -euo pipefail
LOG="/var/log/cve-2026-2371-fix-$(date +%Y%m%d-%H%M%S).log"
exec > >(tee -a "$LOG") 2>&1

echo "[1/4] Detect installed version"
if command -v dpkg >/dev/null; then
    dpkg -s greenshift-animation-and-page-builder-blocks 2>/dev/null | grep -i ^Version || echo "greenshift-animation-and-page-builder-blocks not installed via dpkg"
elif command -v rpm >/dev/null; then
    rpm -q greenshift-animation-and-page-builder-blocks || echo "greenshift-animation-and-page-builder-blocks not installed via rpm"
fi

echo "[2/4] Backup configuration"
BACKUP="/root/backup-cve-2026-2371-$(date +%Y%m%d)"
mkdir -p "$BACKUP"
for d in /etc/greenshift-animation-and-page-builder-blocks /etc/greenshift-animation-and-page-builder-blocks.d /etc/greenshift-animation-and-page-builder-blocks.conf; do
    [ -e "$d" ] && cp -a "$d" "$BACKUP/" || true
done

echo "[3/4] Apply the upgrade (target: See vendor advisory)"
if command -v apt-get >/dev/null; then
    apt-get update
    apt-get install --only-upgrade -y greenshift-animation-and-page-builder-blocks
elif command -v dnf >/dev/null; then
    dnf upgrade --refresh -y greenshift-animation-and-page-builder-blocks
elif command -v yum >/dev/null; then
    yum update -y greenshift-animation-and-page-builder-blocks
elif command -v zypper >/dev/null; then
    zypper --non-interactive update greenshift-animation-and-page-builder-blocks
fi

echo "[4/4] Verify the patched build"
if command -v dpkg >/dev/null; then
    dpkg -s greenshift-animation-and-page-builder-blocks 2>/dev/null | grep -i ^Version
elif command -v rpm >/dev/null; then
    rpm -q greenshift-animation-and-page-builder-blocks
fi
echo "Done. Restart any service that loaded the old library."

If you can't patch immediately

Apply at least one of the following inline controls until you can deploy the patched build. None replace the upgrade.

Restrict exposure with nftables (Linux)


# Allow only trusted CIDR to reach the affected service ports
sudo nft add table inet filter 2>/dev/null || true
sudo nft 'add chain inet filter input { type filter hook input priority 0 ; }' 2>/dev/null || true
sudo nft 'add rule inet filter input tcp dport {80, 443} ip saddr != 10.0.0.0/8 drop'
sudo nft list ruleset

Block at the host firewall (Windows)


New-NetFirewallRule -DisplayName "Block-CVE-2026-2371" -Direction Inbound -Action Block -Protocol TCP -LocalPort 80,443 -RemoteAddress Any -Enabled True
Get-NetFirewallRule -DisplayName "Block-CVE-2026-2371"

Disable the affected service (Linux)


sudo systemctl stop greenshift-animation-and-page-builder-blocks 2>/dev/null || true
sudo systemctl disable greenshift-animation-and-page-builder-blocks 2>/dev/null || true

If the vendor advisory lists an official workaround, prefer that wording verbatim. If no workaround is published, the only safe remediation is the patch.

How to verify the fix worked

After upgrading, confirm the installed version matches the patched build and that no old library is still loaded by a long-running process.


# Linux
dpkg -s greenshift-animation-and-page-builder-blocks 2>/dev/null | grep -i ^Version
rpm -q greenshift-animation-and-page-builder-blocks 2>/dev/null || true
# Pid map check for old library handles
sudo lsof +c0 2>/dev/null | grep -i "DEL.*lib" || true


# Windows
Get-Package -Name "*Greenshift – animation and page builder blocks*" | Select-Object Name, Version
Get-HotFix | Sort-Object InstalledOn -Descending | Select-Object -First 5

Expected: the reported version is at or above See vendor advisory. Restart the affected service (systemctl restart <service> on Linux, or restart the Windows service) so it loads the patched binary.

Frequently asked questions

Other vulnerabilities in the same area that are worth patching alongside this one:

How to Fix CVE-2026-29790: Path traversal in dbt-common — Path traversal in dbt-common
How to Fix CVE-2026-23500: OS command injection in dolibarr — OS command injection in dolibarr
How to Fix CVE-2026-3563: CWE-1289 Improper validation of unsafe equivalence in input , CWE-1289 Improper validation of unsafe equivalence in input
How to Fix CVE-2026-24480: Access Control Bypass in QGIS , Access Control Bypass in QGIS
How to Fix CVE-2026-33451: Secure Access (Bundle Sibling) , Secure Access (Bundle Sibling)

Is CVE-2026-2371 actively exploited?

There is no public confirmation of exploitation in the wild listed in CISA KEV at the time of this writing. Patch anyway. Public exploits commonly follow disclosure within weeks.

Do I need to reboot after patching CVE-2026-2371?

For kernel and OS-level updates, yes. For most userland packages a systemctl restart <service> is enough on Linux, and restarting the Windows service or app on Windows. Any process that loaded the old library keeps using it until restarted.

What is the CVSS score for CVE-2026-2371?

5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Where is the official advisory for CVE-2026-2371?

The vendor advisory is at https://www.wordfence.com/threat-intel/vulnerabilities/id/52632b50-9755-4ebd-a1a8-587cc633debb?source=cve. The NVD record is at https://nvd.nist.gov/vuln/detail/CVE-2026-2371.

References

Official vendor advisory: https://www.wordfence.com/threat-intel/vulnerabilities/id/52632b50-9755-4ebd-a1a8-587cc633debb?source=cve
NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-2371
CISA KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Additional reference: https://plugins.trac.wordpress.org/browser/greenshift-animation-and-page-builder-blocks/tags/12.7.1/settings.php#L1674
Additional reference: https://plugins.trac.wordpress.org/browser/greenshift-animation-and-page-builder-blocks/tags/12.7.1/settings.php#L1630
Additional reference: https://plugins.trac.wordpress.org/browser/greenshift-animation-and-page-builder-blocks/trunk/settings.php#L1674

*Written by Sai Kiran Pandrala. Assembled from the official vendor advisory, NVD record, and CISA KEV listing on 2026-05-25. Always confirm against the vendor's advisory before applying changes in production.*