CVE-2024-45516 Cross-site scripting in n/a

Medium 6.1 Published 14 May 2025 Updated 19 May 2025

Attackers can execute arbitrary JavaScript in Zimbra Classic UI via crafted emails, potentially stealing sensitive data or taking over accounts.

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-2024-45516?

CVE-2024-45516 is a medium-severity cross-site scripting vulnerability in Synacor Zimbra Collaboration Suite, published on 14 May 2025. 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

An issue was discovered in Zimbra Collaboration (ZCS) 9.0.0 before Patch 43, 10.0.x before 10.0.12, 10.1.x before 10.1.4, and 8.8.15 before Patch 47. A Cross-Site Scripting (XSS) vulnerability in the Zimbra Classic UI allows attackers to execute arbitrary JavaScript within the user's session, potentially leading to unauthorized access to sensitive information. This issue arises from insufficient sanitization of HTML content, including malformed <img> tags with embedded JavaScript. The vulnerability is triggered when a user views a specially crafted email in the Classic UI, requiring no additional user interaction.

Weakness: CWE-79

Which versions are affected by CVE-2024-45516?

It affects 1 product.

Products include Synacor Zimbra Collaboration Suite.

How do I fix CVE-2024-45516?

No fix has been published for CVE-2024-45516 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-2024-45516 being exploited?

There is no known exploitation of CVE-2024-45516 in the wild and no public exploit code.

All Synacor Zimbra Collaboration Suite vulnerabilities

Sources

Also known as GHSA-f89j-4hpj-5qjm.