CVE-2021-39321

Sassy Social Share 3.3.23 PHP Object Injection

8.8 High

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

2.04%Up 1.2 points since Oct 22, 2021

What each source reports

CVE List Score used 8.8

Sassy Social Share 3.3.23 PHP Object Injection

Record: CVE-2021-39321
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-863, CWE-502
Updated: 2026-11-02

EUVDEUVD-2021-25682 8.8

Record: EUVD-2021-25682
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-pxqp-jhw5-pvjr No score

Version 3.3.23 of the Sassy Social Share WordPress plugin is vulnerable to PHP Object Injection...

Record: GHSA-pxqp-jhw5-pvjr
Weakness: CWE-502
Updated: 2026-11-02

NVD 8.8

Record: CVE-2021-39321
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 6.5 MediumAV:N/AC:L/Au:S/C:P/I:P/A:P
Weakness: CWE-502, CWE-863
Updated: 2026-11-02

Affected products

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-39321 is a high vulnerability (CVSS 8.8) in Heateor Sassy Social Share, published October 21, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.04%, the 81st percentile. No source names a fixed version.