ThemeMakers PayPal Express Checkout <= 1.1.9 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode

published 2025-02-27 20 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-5119

cvss: 6.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 21%
public exploits: 0; none known

The ThemeMakers PayPal Express Checkout plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'paypal' shortcode in versions up to, and including, 1.1.9 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Patch / fix

fixed in 1 links 1

thememakers paypal_checkout 1.2.0

github.com/ThemeMakers/tmm_paypal_checkout@d6d3b18 commit

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 20 mo ago (2025-02-27)

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
NVD	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected products

ThemeMakers ThemeMakers PayPal Express Checkout

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

Technology feeds

WordPress rss critical rss

References

Sources

CVE List CVE-2025-1689
NVD CVE-2025-1689

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary