CVE-2026-0950

5.3 MEDIUM
Authentication Bypass

📋 TL;DR

The Spectra Gutenberg Blocks plugin for WordPress has an information disclosure vulnerability that allows unauthenticated attackers to read excerpts from password-protected posts. This occurs when the plugin fails to check if a post requires a password before displaying excerpts in certain blocks. All WordPress sites using vulnerable versions of the Spectra plugin are affected.

💻 Affected Systems

Products:
  • Spectra Gutenberg Blocks – Website Builder for the Block Editor (WordPress plugin)
Versions: All versions up to and including 2.19.17
Operating Systems: All operating systems running WordPress
Default Config Vulnerable: ⚠️ Yes
Notes: Only affects sites using Spectra blocks that display post excerpts (Post Grid, Post Masonry, Post Carousel, Post Timeline).

⚠️ Risk & Real-World Impact

🔴

Worst Case

Sensitive information from password-protected posts could be exposed, potentially revealing confidential content, draft materials, or private communications.

🟠

Likely Case

Attackers can read excerpts of password-protected posts, which may contain partial sensitive information or reveal post topics that were intended to remain private.

🟢

If Mitigated

With proper access controls and monitoring, the impact is limited to potential exposure of post excerpts rather than full content.

🌐 Internet-Facing: HIGH
🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ✅ No
Weaponized: LIKELY
Unauthenticated Exploit: ⚠️ Yes
Complexity: LOW

Exploitation requires no authentication and minimal technical skill - attackers simply need to view pages containing vulnerable Spectra blocks.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 2.19.18 or later

Vendor Advisory: https://wordpress.org/plugins/ultimate-addons-for-gutenberg/#developers

Restart Required: No

Instructions:

1. Log into WordPress admin panel
2. Navigate to Plugins → Installed Plugins
3. Find 'Spectra' plugin
4. Click 'Update Now' if update is available
5. Alternatively, download version 2.19.18+ from WordPress.org and manually update

🔧 Temporary Workarounds

Disable vulnerable Spectra blocks

all

Temporarily disable Post Grid, Post Masonry, Post Carousel, and Post Timeline blocks until patched

Remove password-protected posts from public view

all

Temporarily unpublish or remove password protection from sensitive posts

🧯 If You Can't Patch

  • Implement web application firewall rules to block suspicious access patterns to pages with Spectra blocks
  • Increase monitoring of access logs for pages containing vulnerable Spectra blocks

🔍 How to Verify

Check if Vulnerable:

Check WordPress admin → Plugins → Installed Plugins → Spectra version. If version is 2.19.17 or lower, you are vulnerable.

Check Version:

wp plugin get ultimate-addons-for-gutenberg --field=version (if WP-CLI is installed)

Verify Fix Applied:

After updating, verify Spectra plugin version is 2.19.18 or higher in WordPress admin panel.

📡 Detection & Monitoring

Log Indicators:

  • Unusual access patterns to pages containing Spectra blocks
  • Multiple requests to password-protected post URLs from unauthenticated users

Network Indicators:

  • Increased traffic to pages with Post Grid, Masonry, Carousel, or Timeline blocks

SIEM Query:

source="wordpress_access_logs" AND (uri CONTAINS "post-grid" OR uri CONTAINS "post-masonry" OR uri CONTAINS "post-carousel" OR uri CONTAINS "post-timeline") AND status=200 AND user="-"

📊 Metadata

CVE ID: CVE-2026-0950
CVSS v3 Score: 5.3 (MEDIUM)
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE: CWE-200
Published: February 3, 2026
Last Updated: February 4, 2026

🤖 AI-assisted analysis, reviewed for accuracy

🔗 References

📤 Share This