MIR blocks and shortcodes <= 1.0.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
The MIR blocks and shortcodes plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'title' attribute (and other attributes such as 'ready_animation_text') of the 'msc_stats' shortcode in versions up to, and including, 1.0.0. This is due to insufficient input sanitization and output escaping on user supplied shortcode attributes inside the msc_stats() rendering function. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Why it matters now
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 |
|---|---|---|---|---|---|
| mirsoftware | MIR blocks and shortcodes | up to 1.0.0 | — | No fix listed | CNA |
- MIR blocks and shortcodes Vendormirsoftware Affected up to 1.0.0 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-8896
- 2026-10-03 Alias added: GHSA-c2xc-5vpx-hhx9
References
Other 3
- https://www.wordfence.com/threat-intel/vulnerabilities/id/d7d698be-fae6-4960-912a-1078ea407031?source=cve
- https://plugins.trac.wordpress.org/browser/mir-blocks-and-shortcodes/trunk/frontend-templates/function/msc-stats.php#L44
- https://plugins.trac.wordpress.org/browser/mir-blocks-and-shortcodes/trunk/frontend-templates/function/msc-stats.php#L22
Sources
- CVE-2026-8896 · CVE Program
- CVE-2026-8896 · NVD
- FIRST EPSS
- GHSA-c2xc-5vpx-hhx9 · 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