XSS in Thenewsletterplugin Newsletter

CVE-2022-1756

The Newsletter WordPress plugin before 7.4.5 does not sanitize and escape the $_SERVER['REQUEST_URI'] before echoing it back in admin pages. Although this uses addslashes, and most modern browsers automatically URLEncode requests, this is still vulnerable to Reflected XSS in older browsers such as Internet Explorer 9 or below.

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: 0.019 (79.3th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 79.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2022-1756: held from 0.019 to 0.019.

EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2022-1756?
CVE-2022-1756 is a medium-severity vulnerability in Thenewsletterplugin Newsletter, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-06-13.
How severe is CVE-2022-1756?
Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2022-1756 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.