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Vulnerability record · CVE-2021-39321 · published 21 October 2021

CVE-2021-39321: Heateor sassy social share deserialization of untrusted data vulnerability

HHeateor · Sassy Social Share

Version 3.3.23 of the Sassy Social Share WordPress plugin is vulnerable to PHP Object Injection via the wp_ajax_heateor_sss_import_config AJAX action due to deserialization of unvalidated user supplied inputs via the import_config function found in the ~/admin/class-sassy-social-share-admin.php file. This can be exploited by underprivileged authenticated users due to a missing capability check on the import_config function.

8.8 CVSS 3.1 High EPSS 2.0% · top 19.6% CWE-502 · Deserialization of untrusted dataCWE-863 · Incorrect authorization
8.8CVSS 3.1 base score, v2 6.5
2.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Version 3.3.23 of the Sassy Social Share WordPress plugin is vulnerable to PHP Object Injection via the wp_ajax_heateor_sss_import_config AJAX action due to deserialization of unvalidated user supplied inputs via the import_config function found in the ~/admin/class-sassy-social-share-admin.php file. This can be exploited by underprivileged authenticated users due to a missing capability check on the import_config function.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://plugins.trac.wordpress.org/changeset/2600464/sassy-social-share/trunk/admin/class-sassy-social-share-admin.php PatchThird Party Advisory
https://www.wordfence.com/blog/2021/10/vulnerability-patched-in-sassy-social-share-plugin/ ExploitThird Party Advisory
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39321 Third Party Advisory
https://plugins.trac.wordpress.org/changeset/2600464/sassy-social-share/trunk/admin/class-sassy-social-share-admin.php PatchThird Party Advisory
https://www.wordfence.com/blog/2021/10/vulnerability-patched-in-sassy-social-share-plugin/ ExploitThird Party Advisory
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39321 Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-39321), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.