What’s Vulnerable › Vulnerabilities

CVE-2021-34634: Nifty Newsletters <= 4.0.23 - Cross-Site Request Forgery to Stored Cross-Site Scripting

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-08-05 · updated 2026-06-17
• Weakness: CWE-352

Description

The Nifty Newsletters WordPress plugin is vulnerable to Cross-Site Request Forgery via the sola_nl_wp_head function found in the ~/sola-newsletters.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 4.0.23.

Affected products

• SolaPlugins Nifty Newsletters: through 4.0.23

References

• https://plugins.trac.wordpress.org/browser/sola-newsletters/trunk/sola-newsletters.php#L774
• https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34634
• https://plugins.trac.wordpress.org/browser/sola-newsletters/trunk/sola-newsletters.php#L774
• https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34634

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