CVE-2021-24815

Paypal Donation <= 1.3.1 - Admin+ Stored Cross-Site Scripting

2021-10-18 00:00

Strategic Overview

Status: Patched in 1.3.2
Affected Plugin: Accept Donations with PayPal & Stripe
Affected Version: <= 1.3.1
CVSS: 4.8Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2021-24815

View all Accept Donations with PayPal & Stripe vulnerabilities

At a glance

CVE-2021-24815 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Accept Donations with PayPal & Stripe WordPress plugin, affecting versions <= 1.3.1. It carries a CVSS score of 4.8 (reachable over the network; low attack complexity). The issue is fixed in version 1.3.2; sites on affected versions should update now. Disclosed October 2021, reported by dc11.

Vulnerability Overview

The Accept Donations with PayPal WordPress plugin before 1.3.2 does not escape the Amount Menu Name field of created Buttons, which could allow a high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Reaching this weakness in Accept Donations with PayPal & Stripe <= 1.3.1 takes a caller who can reach the endpoint. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Accept Donations with PayPal & Stripe the fix is 1.3.2: builds <= 1.3.1 are affected, anything from 1.3.2 onward is not.

Remediation

Update to version 1.3.2, 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 1.3.2 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24815 https://www.wordfence.com/threat-intel/vulnerabilities/id/1d7860bf-3f3d-4bd2-82b0-7bb94d00ff30 https://nvd.nist.gov/vuln/detail/CVE-2021-24815

Related records

Same weakness class

Other vulnerabilities in Accept Donations with PayPal & Stripe

CVSS Vector

4.8

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredHigh
User InteractionRequired
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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