What is CVE-2021-24923?

CVE-2021-24923 is a medium-severity vulnerability in Brevo Newsletter\,_smtp\,_email_marketing_and_subscribe, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-01-24.

How severe is CVE-2021-24923?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2021-24923 known to be exploited?

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

XSS in Brevo Newsletter\,_smtp\,_email_marketing_and_subscribe

CVE-2021-24923

The Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue WordPress plugin before 3.1.25 does not escape the sib-statistics-date parameter before outputting it back in an attribute, leading to a Reflected Cross-Site Scripting…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.008 (52.3th percentile) — read the EPSS interpretation.

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.

Affected products

Brevo Newsletter\,_smtp\,_email_marketing_and_subscribe
Unknown Newsletter, Smtp, Email Marketing And Subscribe Forms By Sendinblue — versions 3.1.25

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

contact@wpscan.com (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-24923?: CVE-2021-24923 is a medium-severity vulnerability in Brevo Newsletter\,_smtp\,_email_marketing_and_subscribe, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-01-24.
How severe is CVE-2021-24923?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2021-24923 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.