← Vulnerability feed

Vulnerability record · CVE-2021-24657 · published 20 September 2021

CVE-2021-24657: Limit login attempts project limit login attempts cross-site scripting vulnerability

Limit Login Attempts Project · Limit Login Attempts

The Limit Login Attempts WordPress plugin before 4.0.50 does not escape the IP addresses (which can be controlled by attacker via headers such as X-Forwarded-For) of attempted logins before outputting them in the reports table, leading to an Unauthenticated Stored Cross-Site Scripting issue.

6.1 CVSS 3.1 Medium EPSS 1.6% · top 25.5% CWE-79 · Cross-site scripting
6.1CVSS 3.1 base score, v2 4.3
1.6%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 Limit Login Attempts WordPress plugin before 4.0.50 does not escape the IP addresses (which can be controlled by attacker via headers such as X-Forwarded-For) of attempted logins before outputting them in the reports table, leading to an Unauthenticated Stored Cross-Site Scripting issue.

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/c789ca04-d88c-4789-8be1-812888f0c8f8 ExploitThird Party Advisory
https://wpscan.com/vulnerability/c789ca04-d88c-4789-8be1-812888f0c8f8 ExploitThird Party Advisory

Track CVE-2021-24657 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

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

9.8CVE-2022-0787Limit login attempts project limit login attempts sql injection vulnerabilityThe Limit Login Attempts (Spam Protection) WordPress plugin before 5.1 does not sanitise and escape some parameters before using them in SQL statemen…EPSS 8.6%9.8CVE-2012-10001Limit login attempts project limit login attempts improper authentication vulnerabilityThe Limit Login Attempts plugin before 1.7.1 for WordPress does not clear auth cookies upon a lockout, which might make it easier for remote attacker…EPSS 2.5%6.1CVE-2023-1912Limit login attempts project limit login attempts cross-site scripting vulnerabilityThe Limit Login Attempts plugin for WordPress is vulnerable to Stored Cross-Site Scripting via its lock logging feature in versions up to, and includ…EPSS 0.79%5.4CVE-2023-1861Limit login attempts project limit login attempts cross-site scripting vulnerabilityThe Limit Login Attempts WordPress plugin through 1.7.2 does not sanitize and escape usernames when outputting them back in the logs dashboard, which…EPSS 29%6.1CVE-2026-42897Microsoft Exchange Server XSS enables spoofingMicrosoft Exchange Server and Exchange Server Subscription Edition fail to neutralize input during web page generation, a cross-site scripting flaw (…KEVEPSS 0.52%analysed6.1CVE-2025-48700Zimbra Classic UI stored XSS via crafted email HTMLZimbra Collaboration Suite Classic UI fails to properly sanitize HTML content in email messages, allowing crafted tag structures and attribute values…KEVEPSS 1.7%analysed6.1CVE-2025-66376Zimbra Collaboration Classic UI stored XSS via CSS @import in emailZimbra Collaboration Suite 10 before 10.0.18 and 10.1 before 10.1.13 allows stored cross-site scripting in the Classic UI through CSS @import directi…KEVEPSS 20%analysed6.1CVE-2025-68461Roundcube Webmail XSS via SVG animate tagRoundcube Webmail before 1.5.12 and 1.6 before 1.6.12 is vulnerable to cross-site scripting through the animate tag in an SVG document. Because the f…KEVEPSS 27%analysed

Source: NIST National Vulnerability Database (record CVE-2021-24657), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.