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CVE-2021-24874 Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue < 3.1.31 - Reflected Cross-Site Scripting

Medium 6.1 Published Updated

Attackers can inject malicious scripts via unescaped parameters in the Sendinblue WordPress plugin, potentially compromising user sessions.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
A user has to click or open something
Fix
None listed

What is CVE-2021-24874?

CVE-2021-24874 is a medium-severity cross-site scripting vulnerability in Unknown Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue, published on 14 Feb 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

The Newsletter, SMTP, Email marketing and Subscribe forms by Sendinblue WordPress plugin before 3.1.31 does not escape the lang and pid parameter before outputting them back in attributes, leading to Reflected Cross-Site Scripting issues

Weakness: CWE-79

Which versions are affected by CVE-2021-24874?

It affects 1 product.

Products include Brevo Newsletter\, Smtp\, Email Marketing and Subscribe.

How do I fix CVE-2021-24874?

No fix has been published for CVE-2021-24874 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2021-24874 being exploited?

There is no known exploitation of CVE-2021-24874 in the wild and no public exploit code.

Sources

Also known as GHSA-2hcr-94vw-mxjh.

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