PT-2021-22076 · Nextscripts · Nextscripts: Social Networks Auto-Poster

Published 2021-11-01 · Updated 2021-11-02 · CVE-2021-38356

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions The NextScripts: Social Networks Auto-Poster versions 4.3.20 and earlier

Description The issue allows for Reflected Cross-Site Scripting via the page parameter, which is echoed out on inc/nxs class snap.php. This can be achieved by supplying the value 'nxssnap-post' to load the page in page along with malicious JavaScript.

Recommendations For versions 4.3.20 and earlier, as a temporary workaround, consider restricting access to the inc/nxs class snap.php file until a patch is available. Avoid using the page parameter in the affected endpoint until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-38356

Affected Products

Nextscripts: Social Networks Auto-Poster

References · 4

• 🔥 https://wordfence.com/blog/2021/10/xss-vulnerability-in-nextscripts-social-networks-auto-poster-plugin-impacts-100000-sites · Exploit
• https://osv.dev/vulnerability/CVE-2021-38356 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-38356 · Security Note
• https://t.me/cibsecurity/31578 · Telegram Post