CVE-2019-18378

Name: CVE-2019-18378
Creator: NVD / NIST
Published: 2019-12-11T16:15:11.65+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.8/10EPSS 0.73%

Last modified Jun 17, 2026

CVE-2019-18378 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. Symantec Messaging Gateway, prior to 10.7.3, may be susceptible to a cross-site scripting (XSS) exploit, which is a type of issue that can enable attackers to inject client-side scripts into web pages viewed by other users. A cross-site scripting vulnerability may be used by attackers to potentially bypass access controls such as the same-origin policy.. EPSS estimates a 0.73% chance of exploitation in the next 30 days.

Description

Symantec Messaging Gateway, prior to 10.7.3, may be susceptible to a cross-site scripting (XSS) exploit, which is a type of issue that can enable attackers to inject client-side scripts into web pages viewed by other users. A cross-site scripting vulnerability may be used by attackers to potentially bypass access controls such as the same-origin policy.

Metrics

CVSS 3.1

4.8/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.73%

49.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Symantec	Messaging Gateway	< 10.7.3

References

https://support.symantec.com/us/en/article.SYMSA1501.htmlVendor Advisory
https://support.symantec.com/us/en/article.SYMSA1501.htmlVendor Advisory

Timeline

Published: Dec 11, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-18378?

How severe is CVE-2019-18378?

CVE-2019-18378 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 0.73% probability of exploitation in the next 30 days.

How do I fix CVE-2019-18378?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-18378?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST