CVE-2023-0535: The Donation Block For PayPal WordPress plugin before 2.1.0 does not validate and escape some of its shortcode

Q: How do I fix CVE-2023-0535?

donation block for paypal: upgrade to 2.1.0. Exact commands for each OS are on this page.

Q: Is CVE-2023-0535 being exploited?

CVE-2023-0535 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-0535 affect?

CVE-2023-0535 affects donation block for paypal. Severity is medium (CVSS 5.4). The Donation Block For PayPal WordPress plugin before 2.1.0 does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contributor

Q: How urgent is CVE-2023-0535?

Priority 34/100. Public exploit reference

Routine

MEDIUM 5.4UPGRADE

CVE-2023-0535 is a medium-severity flaw (CVSS 5.4) affecting donation block for paypal. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Donation Block For PayPal WordPress plugin before 2.1.0 does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.5% (top 60%)
CISA exploited list	No
Published	2023-02-27
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: donation block for paypal project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-02-27 16:15 UTCPublished CVE record published
2026-06-17 05:25 UTCUpdated Record last modified

donation block for paypal project donation block for paypal UPGRADE

Affected: < 2.1.0

Fixed in: 2.1.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy donation-block-for-paypal || rpm -q donation-block-for-paypal || donation-block-for-paypal --version

2. UPGRADE to 2.1.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade donation-block-for-paypal

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade donation-block-for-paypal

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-0535?

donation block for paypal: upgrade to 2.1.0. Exact commands for each OS are on this page.

Is CVE-2023-0535 being exploited?

CVE-2023-0535 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-0535 affect?

CVE-2023-0535 affects donation block for paypal. Severity is medium (CVSS 5.4). The Donation Block For PayPal WordPress plugin before 2.1.0 does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contributor

How urgent is CVE-2023-0535?

Priority 34/100. Public exploit reference

Software pages

WordPress vulnerabilities

Related CVEs

CVE-2024-6021 MEDIUM 6.8 UPGRADE The Donation Block For PayPal WordPress plugin through 2.1.0 does not sanitise and escape form submissions, le

References

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