CVE-2021-24320: The Bello - Directory & Listing WordPress theme before 1.6.0 did not properly sanitise and escape its listing_list_view, bt_bb_listing_field_my_lat…

PriorityP343medium6.1CVSS 3.1

AVNACLPRNUIRSCCLILAN

EXPLOIT

EPSS

10.77%

95.3th percentile

The Bello - Directory & Listing WordPress theme before 1.6.0 did not properly sanitise and escape its listing_list_view, bt_bb_listing_field_my_lat, bt_bb_listing_field_my_lng, bt_bb_listing_field_distance_value, bt_bb_listing_field_my_lat_default, bt_bb_listing_field_keyword, bt_bb_listing_field_location_autocomplete, bt_bb_listing_field_price_range_from and bt_bb_listing_field_price_range_to parameter in ints listing page, leading to reflected Cross-Site Scripting issues.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
bold-themes	bello	< 1.6.0	1.6.0
boldthemes	bello_directory_listing	>= 1.6.0 < 1.6.0	1.6.0

Detection & IOCsextracted from sources · hover to see the quote

otheralert(document.domain)

→Monitor GET/POST requests to the listing page for unsanitised values in the parameters: listing_list_view, bt_bb_listing_field_my_lat, bt_bb_listing_field_my_lng, bt_bb_listing_field_distance_value, bt_bb_listing_field_my_lat_default, bt_bb_listing_field_keyword, bt_bb_listing_field_location_autocomplete, bt_bb_listing_field_price_range_from, bt_bb_listing_field_price_range_to — any of these carrying script/XSS payloads indicates exploitation. ↗
→Nuclei/scanner probe for this CVE checks for HTTP 200 response with Content-Type: text/html and the XSS payload reflected in the body; alert on matching response signatures.
→The vulnerability affects Bello - Directory & Listing WordPress theme versions before 1.6.0; flag installations running older versions as at-risk. ↗

·The Nuclei template digest/signature is embedded in the scanner rule and is not itself an IOC; it is used for template integrity verification only.

CVSS provenance

nvdv3.16.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

nvdv2.04.3MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N

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