CVE-2018-20239 — Application Links before version 5.0.11, from version 5.1.0 before 5.2.10, from version 5.3.0 before 5.3.6, from version 5.4.0 before 5.4.12, and from version 6.0.0 before 6.0.4 allows remote attackers to inject arbitrary HTML or JavaScript via a cross site scripting (XSS) vulnerability in the applinkStartingUrl parameter

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MEDIUM

Application Links before version 5.0.11, from version 5.1.0 before 5.2.10, from version 5.3.0 before 5.3.6, from version 5.4.0 before 5.4.12, and from version 6.0.0 before 6.0.4 allows remote attackers to inject arbitrary HTML or JavaScript via a cross site scripting (XSS) vulnerability in the applinkStartingUrl parameter

Published Apr 30, 2019

5.4

MEDIUM

CVSS 3.1

EPSS 3.34%

Description

Application Links before version 5.0.11, from version 5.1.0 before 5.2.10, from version 5.3.0 before 5.3.6, from version 5.4.0 before 5.4.12, and from version 6.0.0 before 6.0.4 allows remote attackers to inject arbitrary HTML or JavaScript via a cross site scripting (XSS) vulnerability in the applinkStartingUrl parameter. The product is used as a plugin in various Atlassian products where the following are affected: Confluence before version 6.15.2, Crucible before version 4.7.0, Crowd before version 3.4.3, Fisheye before version 4.7.0, Jira before version 7.13.3 and 8.x before 8.1.0.

Affected products

Vendor Atlassian Product Atlassian Application Links Default
n/a
- Version
  5.1.0
  Status
  affected
  Constraints
  <unspecified
- Version
  5.3.0
  Status
  affected
  Constraints
  <unspecified
- Version
  5.4.0
  Status
  affected
  Constraints
  <unspecified
- Version
  6.0.0
  Status
  affected
  Constraints
  <unspecified
- Version
  unspecified
  Status
  affected
  Constraints
  <5.0.11
- Version
  unspecified
  Status
  affected
  Constraints
  <5.2.10
- Version
  unspecified
  Status
  affected
  Constraints
  <5.3.6
- Version
  unspecified
  Status
  affected
  Constraints
  <5.4.12
- Version
  unspecified
  Status
  affected
  Constraints
  <6.0.4

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Atlassian

Atlassian Application Links

n/a

Version	Status	Constraints
5.1.0	affected	<unspecified
5.3.0	affected	<unspecified
5.4.0	affected	<unspecified
6.0.0	affected	<unspecified
unspecified	affected	<5.0.11
unspecified	affected	<5.2.10
unspecified	affected	<5.3.6
unspecified	affected	<5.4.12
unspecified	affected	<6.0.4

Remediation

No remediation recorded yet.

Metrics

3.34% 0.03339

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.03339

Score over time

2021–2026

EPSS v1
EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v1
EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (14 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	3.34% (0.03339)	88.25th	v5 (v2026.06.15)
Jun 15, 2026	3.40% (0.03401)	87.25th	v5 (v2026.06.15)
Mar 17, 2025	0.37% (0.00374)	56.99th	v4 (v2025.03.14)
Dec 12, 2024	0.24% (0.00243)	64.86th	v3 (v2023.03.01)
Apr 22, 2024	0.24% (0.00243)	64.05th	v3 (v2023.03.01)
Mar 7, 2023	0.19% (0.00195)	55.64th	v3 (v2023.03.01)
Mar 6, 2023	1.23% (0.01232)	67.28th	v2 (v2022.01.01)
Dec 23, 2022	1.23% (0.01232)	66.86th	v2 (v2022.01.01)
Apr 1, 2022	1.23% (0.01232)	64.85th	v2 (v2022.01.01)
Feb 4, 2022	1.23% (0.01232)	41.02th	v2 (v2022.01.01)
Feb 3, 2022	1.82% (0.01823)	35.21th	v1
Jan 6, 2022	1.82% (0.01823)	34.51th	v1
Sep 1, 2021	1.82% (0.01823)	74.64th	v1
Apr 14, 2021	1.82% (0.01823)	0.00th	v1

Weaknesses (1)

CWE-79

Cross-site Scripting (XSS)

References (6)

https://ecosystem.atlassian.net/browse/APL-1373
x_refsource_MISCIssue TrackingVendor Advisory
https://jira.atlassian.com/browse/CONFSERVER-58208
x_refsource_MISCIssue TrackingVendor Advisory
https://jira.atlassian.com/browse/CRUC-8379
x_refsource_MISCIssue TrackingVendor Advisory
https://jira.atlassian.com/browse/CWD-5362
x_refsource_MISCIssue TrackingVendor Advisory
https://jira.atlassian.com/browse/FE-7161
x_refsource_MISCIssue TrackingVendor Advisory
https://jira.atlassian.com/browse/JRASERVER-68855
x_refsource_MISCIssue TrackingVendor Advisory

Link	Providers	Tags
https://ecosystem.atlassian.net/browse/APL-1373		x_refsource_MISCIssue TrackingVendor Advisory
https://jira.atlassian.com/browse/CONFSERVER-58208		x_refsource_MISCIssue TrackingVendor Advisory
https://jira.atlassian.com/browse/CRUC-8379		x_refsource_MISCIssue TrackingVendor Advisory
https://jira.atlassian.com/browse/CWD-5362		x_refsource_MISCIssue TrackingVendor Advisory
https://jira.atlassian.com/browse/FE-7161		x_refsource_MISCIssue TrackingVendor Advisory
https://jira.atlassian.com/browse/JRASERVER-68855		x_refsource_MISCIssue TrackingVendor Advisory