XSS in Nextscripts Nextscripts: Social Networks Auto-Poster
CVE-2021-38356
The NextScripts: Social Networks Auto-Poster <= 4.3.20 WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the $_REQUEST['page'] parameter which is echoed out on inc/nxs_class_snap.php by supplying the appropriate value 'nxssnap-post' to load the page in $_GET['page'] along with malicious JavaScript in $_POST['page'].
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.009 (57.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.wordfence.com/blog/2021/10/xss-vulnerability-in-nextscripts-social-networks… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-38356?
- CVE-2021-38356 is a medium-severity vulnerability in Nextscripts Nextscripts: Social Networks Auto-Poster, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-11-01.
- How severe is CVE-2021-38356?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2021-38356 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.