CVE-2021-34658

Summary

The Simple Popup Newsletter WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to the use of $_SERVER['PHP_SELF'] in the ~/simple-popup-newsletter.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.4.7.

Affected Software

Weaknesses

• CWE-79: CWE-79 Cross-site Scripting (XSS)

ADP Enrichment

CVE Program Container

Additional References

• https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34658
• https://plugins.trac.wordpress.org/browser/simple-popup-newsletter/trunk/simple-popup-newsletter.php#L319

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34658
• https://plugins.trac.wordpress.org/browser/simple-popup-newsletter/trunk/simple-popup-newsletter.php#L319

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