What is CVE-2023-5620?

CVE-2023-5620 is a medium-severity vulnerability in Webpushr Web Push Notifications, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-11-27.

How severe is CVE-2023-5620?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Is CVE-2023-5620 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Webpushr Web Push Notifications

CVE-2023-5620

The Web Push Notifications WordPress plugin before 4.35.0 does not prevent visitors on the site from changing some of the plugin options, some of which may be used to conduct Stored XSS attacks.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-11-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (34.6th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 34.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Webpushr Web Push Notifications
Web Push Notifications — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

20142995/nuclei-templates

References

wpscan.com/vulnerability/a03330c2-3ae0-404d-a114-33b18cc47666 (Exploit, technical-description, Third Party Advisory, exploit, vdb-entry)

Frequently asked questions

What is CVE-2023-5620?: CVE-2023-5620 is a medium-severity vulnerability in Webpushr Web Push Notifications, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-11-27.
How severe is CVE-2023-5620?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2023-5620 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.