CVE-2020-36525Public exploitNetwork attack vector

Stored XSS via unsafe href parameter

Published Jun 3, 2022 · Updated Apr 15, 2025

Cross-site scripting in Appfire Linking for Confluence 5.5.3 allows remote authenticated users to execute script in viewers' browsers via a crafted macro. The Link in New Window macro accepts an href value containing JavaScript and stores it in a page without neutralization, so the payload runs when a viewer clicks the generated link. Exploitation requires permission to create or edit a Confluence page and a victim to click the link; the documented impact is script execution in the victim's browser with low integrity impact.

CVSS severity3.5
Low
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Appfire Linking for Confluence 5.5.3 allows remote authenticated users to execute script in viewers' browsers via a crafted macro. The Link in New Window macro accepts an href value containing JavaScript and stores it in a page without neutralization, so the payload runs when a viewer clicks the generated link. Exploitation requires permission to create or edit a Confluence page and a victim to click the link; the documented impact is script execution in the victim's browser with low integrity impact.

The record

CVE
CVE-2020-36525
Published
Jun 3, 2022
Updated
Apr 15, 2025
Vendor
Appfire
Product
Linking for Confluence
Classifications
CWE-79, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 3, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2025Record 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=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Appfire · Linking for Confluenceversion=n/a

Published CVSS scores

3.5VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Cross-site Scripting
T1190Exploit Public-Facing Application

Public exploit references

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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