WordPress Comment Guestbook plugin <= 0.8.0 - Authenticated Stored Cross-Site Scripting (XSS) vulnerability
Priority LOW 23CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- Required
- 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
Authenticated (admin+) Stored Cross-Site Scripting (XSS) vulnerability in Comment Guestbook plugin <= 0.8.0 at WordPress.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00512 43rd 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 |
|---|---|---|---|---|---|
| mibuthu | Comment Guestbook (WordPress plugin) | <= 0.8.0 – 0.8.0 | — | No fix listed | CNA |
- Comment Guestbook (WordPress plugin) Vendormibuthu Affected <= 0.8.0 – 0.8.0 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:comment_guestbook_project:comment_guestbook:*:*:*:*:*:wordpress:*:* | up to 0.8.0 | Vulnerable | Comment Guestbook Project |
- cpe:2.3:a:comment_guestbook_project:comment_guestbook:*:*:*:*:*:wordpress:*:* Versions up to 0.8.0 Vulnerable ·Comment Guestbook Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-36830
- 2026-10-03 Alias added: GHSA-m8c4-mx3x-3676
References
More mibuthu vulnerabilities
- TI-2025-30480 WordPress Link View plugin <= 0.8.0 - Cross Site Scripting (XSS) vulnerability CVSS 3.1MEDIUM 6.5
- TI-2025-31154 WordPress Link View plugin <= 0.8.0 - Cross Site Scripting (XSS) vulnerability CVSS 3.1MEDIUM 5.9
Sources
- CVE-2021-36830 · CVE Program
- CVE-2021-36830 · NVD
- FIRST EPSS
- GHSA-m8c4-mx3x-3676 · GitHub Advisory Database · CC BY 4.0
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