CVE-2020-4013Network attack vector

Stored XSS via unescaped review objectives

Published Jun 1, 2020 · Updated Sep 16, 2024

Stored XSS in Atlassian FishEye and Crucible before 4.8.1 allows remote authenticated users to run script through review objectives. The review resource stores attacker-controlled objective content and renders it as HTML without adequate output encoding. A user with review-editing access must save the content and another user must view the review, allowing script execution in the viewer's browser context.

CVSS severity5.4
Medium
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Atlassian FishEye and Crucible before 4.8.1 allows remote authenticated users to run script through review objectives. The review resource stores attacker-controlled objective content and renders it as HTML without adequate output encoding. A user with review-editing access must save the content and another user must view the review, allowing script execution in the viewer's browser context.

The record

CVE
CVE-2020-4013
Published
Jun 1, 2020
Updated
Sep 16, 2024
Vendor
Atlassian
Product
FishEye
Classifications
CWE-79
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 1, 2020CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <4.8.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Atlassian · FishEyeversion=unspecified <4.8.1
Atlassian · Crucibleversion=unspecified <4.8.1

Published CVSS scores

3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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