CVE-2021-24150

published 2021-04-05

CVE-2021-24150: The LikeBtn WordPress Like Button Rating ♥ LikeBtn WordPress plugin before 2.6.32 was vulnerable to Unauthenticated Full-Read Server-Side Request Forgery…

Priority P3 54 high 7.5 CVSS 3.1

AV N AC L PR N UI N S U C H I N A N

EXPLOIT

The LikeBtn WordPress Like Button Rating ♥ LikeBtn WordPress plugin before 2.6.32 was vulnerable to Unauthenticated Full-Read Server-Side Request Forgery (SSRF).

Affected

1 ranges

Vendor	Product	Version range	Fixed in
likebtn-like-button_project	likebtn-like-button	< 2.6.32	2.6.32

Detection & IOCs extracted from sources · hover to see the quote

url /wp-admin/admin-ajax.php?action=likebtn_prx&likebtn_q={{base64('http://likebtn.com.oast.me')}}↗

other action=likebtn_prx↗

• → SSRF trigger: unauthenticated GET request to wp-admin/admin-ajax.php with action=likebtn_prx and a base64-encoded URL in the likebtn_q parameter. No authentication required. ↗
• → Successful SSRF exploitation returns HTTP 200 with body containing 'Interactsh Server', confirming the server fetched the attacker-controlled URL. ↗
• → The vulnerable AJAX action is 'likebtn_prx'; monitor WordPress access logs for unauthenticated requests to admin-ajax.php with this action parameter. ↗

• · The likebtn_q parameter value must be base64-encoded; the SSRF payload URL is passed as a base64 string, not plaintext. ↗
• · The vulnerability is unauthenticated (PR:N), meaning no WordPress credentials or session are needed to trigger the SSRF. ↗

CVSS provenance

nvd v3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

nvd v2.0 5.0 MEDIUM AV:N/AC:L/Au:N/C:P/I:N/A:N

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