CVE-2021-24989

Accept Donations with PayPal <= 1.3.3 - Arbitrary Post Deletion via Cross-Site Request Forgery

2021-12-09 00:00
Krzysztof Zając

Strategic Overview

Status
Patched in 1.3.4
Affected Plugin
Accept Donations with PayPal & Stripe
Affected Version
<= 1.3.3
CVSS
6.5Medium
Weakness type
CWE-352 · Cross-Site Request Forgery (CSRF)
CVE
CVE-2021-24989
View all Accept Donations with PayPal & Stripe vulnerabilities

At a glance

CVE-2021-24989 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the Accept Donations with PayPal & Stripe WordPress plugin, affecting versions <= 1.3.3. It carries a CVSS score of 6.5 (reachable over the network; low attack complexity; high integrity impact). Exploitation requires no authentication. The issue is fixed in version 1.3.4; sites on affected versions should update now. Disclosed December 2021, reported by Krzysztof Zając.

Vulnerability Overview

The Accept Donations with PayPal WordPress plugin before 1.3.4 does not have CSRF check in place and does not ensure that the post to be deleted belongs to the plugin, allowing attackers to make a logged in admin delete arbitrary posts from the blog

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site. A successful exploit has high impact on integrity.

CWE-352: Cross-Site Request Forgery (CSRF)

Reaching this weakness in Accept Donations with PayPal & Stripe <= 1.3.3 takes a caller who can reach the endpoint. Cross-site request forgery abuses the fact that browsers attach a victim's cookies to any request, so a state-changing action that only checks who you are, not whether you meant to act, can be triggered from another site.

An attacker who gets a logged-in user to load a crafted page can perform that action as them, with the impact scaling to whatever the victim's role is allowed to do. For Accept Donations with PayPal & Stripe the fix is 1.3.4: builds <= 1.3.3 are affected, anything from 1.3.4 onward is not.

Remediation

Update to version 1.3.4, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Accept Donations with PayPal & Stripe: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Accept Donations with PayPal & Stripe 1.3.4 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24989https://www.wordfence.com/threat-intel/vulnerabilities/id/641e52d1-d046-4c15-9624-3b1919cd674fhttps://nvd.nist.gov/vuln/detail/CVE-2021-24989

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C