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Vulnerability record · CVE-2021-24980 · published 27 December 2021

CVE-2021-24980: Gwolle guestbook project gwolle guestbook cross-site scripting vulnerability

GGwolle Guestbook Project · Gwolle Guestbook

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

6.1 CVSS 3.1 Medium EPSS 0.80% · top 45.2% CWE-79 · Cross-site scripting
6.1CVSS 3.1 base score, v2 4.3
0.80%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://wpscan.com/vulnerability/e50bcb39-9a01-433f-81b3-fd4018672b85 ExploitThird Party Advisory
https://wpscan.com/vulnerability/e50bcb39-9a01-433f-81b3-fd4018672b85 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-24980), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.