What is CVE-2019-19456?

CVE-2019-19456 is a medium-severity vulnerability in Wowza Streaming Engine, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-05-18.

How severe is CVE-2019-19456?

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

Is CVE-2019-19456 known to be exploited?

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

XSS in Wowza Streaming Engine

CVE-2019-19456

A Reflected XSS was found in the server selection box inside the login page at: enginemanager/loginfailed.html in Wowza Streaming Engine <= 4.x.x. This issue was resolved in Wowza Streaming Engine 4.8.0.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-05-18 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.010 (61.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 61.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Wowza Streaming Engine

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2019-19456?: CVE-2019-19456 is a medium-severity vulnerability in Wowza Streaming Engine, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-05-18.
How severe is CVE-2019-19456?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2019-19456 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.