Incorrect authorization in BlockSpare – Gutenberg Blocks for News, Magazine, Blog &…
Priority LOW 20CWE-863Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-863.
Summary
The BlockSpare plugin for WordPress is vulnerable to authorization bypass due to incorrect logic in the permission callback in all versions up to, and including, 4.2.6 due to the use of an AND (&&) operator instead of an OR (||) operator. This makes it possible for authenticated attackers, with Subscriber-level access and above, to bypass authorization checks and create arbitrary posts.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00295 22nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| blockspare | BlockSpare – Gutenberg Blocks for News, Magazine, Blog & Business Websites | up to 4.2.6 | — | No fix listed | CNA |
- BlockSpare – Gutenberg Blocks for News, Magazine, Blog & Business Websites Vendorblockspare Affected up to 4.2.6 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-1242
- 2026-10-03 Alias added: GHSA-fr95-rg7g-cqvh
References
More blockspare vulnerabilities
- TI-2025-29992 WordPress Blockspare plugin <= 3.2.9 - Cross Site Scripting (XSS) Vulnerability CVSS 3.1MEDIUM 6.5
- TI-2025-04182 Cross-site scripting in BlockSpare — News, Magazine and Blog Addons for Block Editor CVSS 3.1MEDIUM 6.4
- TI-2024-31681 WordPress Blockspare plugin <= 3.2.4 - Cross Site Scripting (XSS) vulnerability CVSS 3.1MEDIUM 6.5
- TI-2024-28835 WordPress Blockspare plugin <= 3.2.0 - Cross Site Scripting (XSS) vulnerability CVSS 3.1MEDIUM 6.5
- TI-2024-07719 Cross-site scripting in BlockSpare — News, Magazine and Blog Addons for Block Editor CVSS 3.1MEDIUM 6.4
- TI-2022-04562 Freemius SDK <= 2.4.2 - Missing Authorization Checks CVSS 3.1MEDIUM 6.3
Sources
- CVE-2026-1242 · CVE Program
- CVE-2026-1242 · NVD
- FIRST EPSS
- GHSA-fr95-rg7g-cqvh · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences