Stored cross-site scripting in Mang Board plugin for WordPress
Key facts
- Attack vector
- Network
- Privileges required
- None
- 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 Mang Board plugin for WordPress is affected in all versions up to and including 2.4.3. Insufficient input sanitization and output escaping of the content parameter (CWE-79) let unauthenticated attackers store scripts that run in a user's browser when that user opens an injected page. The wp_ajax_nopriv_mb_template endpoint is reachable without login, and its JSON response is served as text/html, so browsers execute the injected tags.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
The Mang Board plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'content' parameter in all versions up to, and including, 2.4.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is exploitable because the wp_ajax_nopriv_mb_template endpoint is publicly accessible without authentication, nonce verification is not enforced for the content_reply mode, and admin-ajax.php responds with Content-Type: text/html, causing browsers to execute injected tags embedded in the JSON response body.
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 |
|---|---|---|---|---|---|
| kitae-park | Mang Board | up to 2.4.3 | — | No fix listed | CNA |
- Mang Board Vendorkitae-park Affected up to 2.4.3 Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for Mang Board.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Timeline
- 2026-10-16 Threatist record created from CVE-2026-109998
- 2026-10-16 CISA SSVC decision points changed
- 2026-10-16 Priority changed: MEDIUM → LOW
- 2026-10-16 Alias added: GHSA-whj8-6p7v-qjm7
References
Other 6
- https://www.wordfence.com/threat-intel/vulnerabilities/id/9fe455dc-8138-49d0-97a1-b0dce111d23b?source=cve
- https://plugins.trac.wordpress.org/browser/mangboard/tags/2.4.3/api/mb-template.php#L150
- https://plugins.trac.wordpress.org/browser/mangboard/tags/2.4.3/api/mb-template.php#L177
- https://plugins.trac.wordpress.org/browser/mangboard/tags/2.4.3/api/mb-board.php#L24
- https://plugins.trac.wordpress.org/browser/mangboard/tags/2.4.3/includes/functions/func.api.php#L146
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3738899%40mangboard&new=3738899%40mangboard
More kitae-park vulnerabilities
- TI-2026-75167 Mang Board Unauthenticated Arbitrary File Upload via image_path Parameter CVSS 3.1CRITICAL 9.8
- TI-2026-74749 SQL injection in Mang Board WP WordPress plugin CVSS 3.1CRITICAL 9.3
- TI-2026-78799 Unrestricted file upload in WordPress Mang Board WP plugin CVSS 3.1CRITICAL 9.9
- TI-2026-53190 Mang Board WP <= 2.3.7 - Authenticated (Subscriber+) Privilege Escalation to Forged Authentication Cookie CVSS 3.1HIGH 8.8
- TI-2026-73824 Local file inclusion in Mang Board WordPress plugin CVSS 3.1HIGH 8.1
- TI-2026-58271 WordPress Mang Board WP plugin <= 2.3.8 - Cross Site Request Forgery (CSRF) vulnerability CVSS 3.1HIGH 8.8
Sources
- CVE-2026-109998 · CVE Program
- CVE-2026-109998 · NVD
- FIRST EPSS
- GHSA-whj8-6p7v-qjm7 · 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