What’s Vulnerable › Vulnerabilities

CVE-2021-4252: WP-Ban ban-options.php toggle_checkbox cross site scripting

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-12-18 · updated 2026-06-17
• Weakness: CWE-707

Description

A vulnerability, which was classified as problematic, has been found in WP-Ban. This issue affects the function toggle_checkbox of the file ban-options.php. The manipulation of the argument $_SERVER["HTTP_USER_AGENT"] leads to cross site scripting. The attack may be initiated remotely. The name of the patch is 13e0b1e922f3aaa3f8fcb1dd6d50200dd693fd76. It is recommended to apply a patch to fix this issue. The identifier VDB-216209 was assigned to this vulnerability.

Affected products

• WP-Ban: before 2021-11-24 — fixed in 2021-11-24

How to fix

Upgrade to a fixed version: WP-Ban 2021-11-24. Check the vendor advisory for mitigations.

References

• https://github.com/lesterchan/wp-ban/commit/13e0b1e922f3aaa3f8fcb1dd6d50200dd693fd76
• https://github.com/lesterchan/wp-ban/pull/11
• https://vuldb.com/?id.216209
• https://github.com/lesterchan/wp-ban/commit/13e0b1e922f3aaa3f8fcb1dd6d50200dd693fd76
• https://github.com/lesterchan/wp-ban/pull/11
• https://vuldb.com/?id.216209

Get alerted when CVE-2021-4252 or the next vulnerability affects your stack