CVE-2024-21690Network attack vector

Browser code execution and forced actions via reflection

Published Aug 21, 2024 · Updated Nov 6, 2024

Reflected XSS and CSRF in affected Atlassian Confluence Data Center and Server releases allow remote attackers to run browser code. Atlassian has not disclosed the vulnerable endpoint or the server-side operation that reflects attacker-controlled input without safe output handling. Exploitation requires a victim to follow a crafted request; resulting script execution can expose browser-accessible data and force actions under the victim’s active session.

CVSS severity7.1
High
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Reflected XSS and CSRF in affected Atlassian Confluence Data Center and Server releases allow remote attackers to run browser code. Atlassian has not disclosed the vulnerable endpoint or the server-side operation that reflects attacker-controlled input without safe output handling. Exploitation requires a victim to follow a crafted request; resulting script execution can expose browser-accessible data and force actions under the victim’s active session.

The record

CVE
CVE-2024-21690
Published
Aug 21, 2024
Updated
Nov 6, 2024
Vendor
Atlassian
Product
Confluence Data Center
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 6, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=7.20.0 to 7.20.3
  2. Affected versionversion=8.0.0 to 8.0.4
  3. Affected versionversion=8.1.0 to 8.1.4
  4. Affected versionversion=8.2.0 to 8.2.3
  5. Affected versionversion=8.3.0 to 8.3.4
  6. Affected versionversion=8.4.0 to 8.4.5
  7. Affected versionversion=8.5.0 to 8.5.12
  8. Affected versionversion=8.6.0 to 8.6.2
  9. Affected versionversion=8.7.1 to 8.7.2
  10. Affected versionversion=8.8.0 to 8.8.1
  11. Affected versionversion=8.9.0 to 8.9.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Atlassian · Confluence Data Centerversion=7.20.0 to 7.20.3; version=8.0.0 to 8.0.4; version=8.1.0 to 8.1.4; version=8.2.0 to 8.2.3; version=8.3.0 to 8.3.4; version=8.4.0 to 8.4.5; version=8.5.0 to 8.5.12; version=8.6.0 to 8.6.2; version=8.7.1 to 8.7.2; version=8.8.0 to 8.8.1; version=8.9.0 to 8.9.5
Atlassian · Confluence Serverversion=7.20.0 to 7.20.3; version=8.0.0 to 8.0.4; version=8.1.0 to 8.1.4; version=8.2.0 to 8.2.3; version=8.3.0 to 8.3.4; version=8.4.0 to 8.4.5; version=8.5.0 to 8.5.12

Published CVSS scores

7.1AtlassianCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
8.2NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo