Gwolle Guestbook < 4.2.0 - Reflected Cross-Site Scripting
Priority LOW 29CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.
Summary
The Gwolle Guestbook WordPress plugin before 4.2.0 does not sanitise and escape the gwolle_gb_user_email parameter before outputting it back in an attribute, leading to a Reflected Cross-Site Scripting issue in an admin page
Why it matters now
EPSS 0.00827 57th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Gwolle Guestbook (Unknown): 4.2.0
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | Gwolle Guestbook | 4.2.0 to before 4.2.0 | 4.2.0 | Patch available | CNA |
- Gwolle Guestbook VendorUnknown Affected 4.2.0 to before 4.2.0 Fixed in 4.2.0 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:gwolle_guestbook_project:gwolle_guestbook:*:*:*:*:*:wordpress:*:* | before 4.2.0 | Vulnerable | Gwolle Guestbook Project |
- cpe:2.3:a:gwolle_guestbook_project:gwolle_guestbook:*:*:*:*:*:wordpress:*:* Versions before 4.2.0 Vulnerable ·Gwolle Guestbook Project
Remediation
- Fix · CNA Gwolle Guestbook (Unknown) Fixed in 4.2.0
Timeline
- 2026-10-02 Threatist record created from CVE-2021-24980
- 2026-10-03 Alias added: GHSA-jh4v-x3g4-f2hj
References
More Gwolle Guestbook Project Gwolle Guestbook vulnerabilities
- TI-2015-06873 PHP remote file inclusion vulnerability in the Gwolle Guestbook plugin before 1.5.4 for… CVSS 3.0CRITICAL 9.0
- TI-2017-14155 Gwolle Guestbook Plugin cross site scriting CVSS 3.1MEDIUM 6.1
- TI-2018-12718 XSS exists in admin/gb-dashboard-widget.php in the Gwolle Guestbook (gwolle-gb) plugin… CVSS 3.0MEDIUM 6.1
Sources
- CVE-2021-24980 · CVE Program
- CVE-2021-24980 · NVD
- FIRST EPSS
- GHSA-jh4v-x3g4-f2hj · 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