What is CVE-2017-18103?

CVE-2017-18103 is a medium-severity vulnerability in Atlassian Atlassian-Http, classified under Improper Input Validation. CVSS score: 4.7/10. Published 2018-07-18.

How severe is CVE-2017-18103?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Improper input validation in Atlassian Atlassian-Http

CVE-2017-18103

The atlassian-http library, as used in various Atlassian products, before version 2.0.2 allows remote attackers to spoof web content in the Mozilla Firefox Browser through uploaded files that have a content-type of application/mathml+xml.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2018-07-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (55.8th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Atlassian Atlassian-Http — versions unspecified
Atlassian HTTP Library

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

jira.atlassian.com/browse/HTTP-3 (Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2017-18103?: CVE-2017-18103 is a medium-severity vulnerability in Atlassian Atlassian-Http, classified under Improper Input Validation. CVSS score: 4.7/10. Published 2018-07-18.
How severe is CVE-2017-18103?: Medium severity. CVSS v3 base score is 4.7 out of 10.