What is CVE-2019-15053?

CVE-2019-15053 is a medium-severity vulnerability in Atlassian HTML Include And Replace Macro, classified under Cross-site Scripting. CVSS score: 6.8/10. Published 2019-08-14.

How severe is CVE-2019-15053?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Is CVE-2019-15053 known to be exploited?

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

XSS in Atlassian HTML Include And Replace Macro

CVE-2019-15053

The "HTML Include and replace macro" plugin before 1.5.0 for Confluence Server allows a bypass of the includeScripts=false XSS protection mechanism via vectors involving an IFRAME element.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-08-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L.

EPSS exploit prediction

EPSS: 0.013 (69.8th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Atlassian HTML Include And Replace Macro

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

marketplace.atlassian.com/apps/4885/html-include-and-replace-macro (Vendor Advisory)
github.com/l0nax/CVE-2019-15053 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-15053?: CVE-2019-15053 is a medium-severity vulnerability in Atlassian HTML Include And Replace Macro, classified under Cross-site Scripting. CVSS score: 6.8/10. Published 2019-08-14.
How severe is CVE-2019-15053?: Medium severity. CVSS v3 base score is 6.8 out of 10.
Is CVE-2019-15053 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.