Description

The Charitable – Donation Plugin for WordPress – Fundraising with Recurring Donations & More plugin for WordPress is vulnerable to Insecure Direct Object Reference / Authorization Bypass leading to Arbitrary Attachment Deletion in versions up to, and including, 1.8.11.1 via the profile avatar update flow. This is due to the save_avatar() function in Charitable_Profile_Form calling wp_delete_attachment() on an attachment ID read from the user's 'avatar' meta without validating that the attachment is owned by the user, combined with Charitable_Data_Processor::process_picture() returning the raw posted value when no file is uploaded, allowing the 'avatar' user meta to be poisoned with any attacker-chosen attachment ID. This makes it possible for authenticated attackers, with Subscriber-level access and above, to delete arbitrary attachments from the Media Library by performing a two-request chain (first poisoning the stored avatar meta value with a target attachment ID, then triggering deletion via a normal avatar upload).

Weaknesses 1

References 12

• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/charitable/tags/1.8.10.5/includes/abstracts/abstract-class-charitable-form.php#L429
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/charitable/tags/1.8.10.5/includes/forms/class-charitable-profile-form.php#L724
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/charitable/tags/1.8.10.5/includes/forms/class-charitable-profile-form.php#L728
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/charitable/tags/1.8.10.5/includes/users/class-charitable-user.php#L986
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/charitable/tags/1.8.10.5/includes/utilities/class-charitable-data-processor.php#L270
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/charitable/tags/1.8.10/includes/abstracts/abstract-class-charitable-form.php#L429
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/charitable/tags/1.8.10/includes/forms/class-charitable-profile-form.php#L724
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/charitable/tags/1.8.10/includes/forms/class-charitable-profile-form.php#L728
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/charitable/tags/1.8.10/includes/users/class-charitable-user.php#L986
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/charitable/tags/1.8.10/includes/utilities/class-charitable-data-processor.php#L270
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset/3557047/charitable/trunk/includes/forms/class-charitable-profile-form.php?old=3435951&old_path=charitable%2Ftrunk%2Fincludes%2Fforms%2Fclass-charitable-profile-form.php
• wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/657bea00-9709-48b8-807a-c9a18b0aee1d?source=cve

Remediation