What’s Vulnerable › Vulnerabilities

CVE-2024-0621: Simple Share Buttons Adder <= 8.4.11 - Authenticated(Administrator+) Stored Cross-Site Scripting via CSS Settings

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-02-29 · updated 2026-06-17
• Weakness: CWE-79

Description

The Simple Share Buttons Adder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 8.4.11 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

Affected products

• Simple Share Buttons Adder: before 8.4.12 — fixed in 8.4.12

How to fix

Upgrade to a fixed version: Simple Share Buttons Adder 8.4.12. Check the vendor advisory for mitigations.

References

• https://advisory.abay.sh/cve-2024-0621
• https://plugins.trac.wordpress.org/changeset/3032350/
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3032350%40simple-share-buttons-adder&new=3032350%40simple-share-buttons-adder&sfp_email=&sfph_mail=
• https://www.wordfence.com/threat-intel/vulnerabilities/id/93ab9f1a-26ce-466a-a5d3-d2046ec8f94d?source=cve
• https://plugins.trac.wordpress.org/changeset/3032350/
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3032350%40simple-share-buttons-adder&new=3032350%40simple-share-buttons-adder&sfp_email=&sfph_mail=
• https://www.wordfence.com/threat-intel/vulnerabilities/id/93ab9f1a-26ce-466a-a5d3-d2046ec8f94d?source=cve

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