Which products and versions are affected by CVE-2023-22527?

Affected: Confluence Data Center (Atlassian) versions 8.7.0, >= >= 8.0.0; Confluence Server (Atlassian) versions >= >= 8.0.0. The full list is in the CVE brief.

Is CVE-2023-22527 being exploited in the wild?

It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jan 19, 2024 and is known to be used in ransomware campaigns.

Is CVE-2023-22527 in the CISA KEV catalog?

Yes. It was added on Jan 24, 2024 with a federal remediation due date of Feb 14, 2024.

Is there a public exploit for CVE-2023-22527?

Public exploit code is available.

Is there a fix for CVE-2023-22527?

Fixed versions are available, including Confluence Data Center 8.5.4, Confluence Server 8.5.4.

How urgently should CVE-2023-22527 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2023-22527

CriticalExploitedPublic exploit

A template injection vulnerability on older versions of Confluence Data Center and Server allows an unauthenticated attacker to achieve RCE on an affected instance.

Published Jan 16, 2024 · Updated Oct 21, 2025

Key Facts

Patch immediately

CVE-2023-22527 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Confluence Data Center (Atlassian), Confluence Server (Atlassian).
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jan 19, 2024 and is known to be used in ransomware campaigns. Public exploit code is available.
EPSS estimates a 100% probability of exploitation in the next 30 days.
Fixed versions are available, including Confluence Data Center 8.5.4, Confluence Server 8.5.4.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3.1

9.8

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS (30-day exploit likelihood)

100%

Higher than 99.9% of all scored CVEs

Exploited in the wild

Yes

4 catalog listings, used by ransomware

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2023-22527 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

A template injection vulnerability on older versions of Confluence Data Center and Server allows an unauthenticated attacker to achieve RCE on an affected instance. Customers using an affected version must take immediate action.

Most recent supported versions of Confluence Data Center and Server are not affected by this vulnerability as it was ultimately mitigated during regular version updates. However, Atlassian recommends that customers take care to install the latest version to protect their instances from non-critical vulnerabilities outlined in Atlassian’s January Security Bulletin.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
CISA KEV	Jan 24, 2024	Feb 14, 2024	Known
Industry KEV feed	Jan 19, 2024	Feb 14, 2024	Known
CIRCL KEV	Jan 22, 2024	Feb 14, 2024	Known
ENISA EUVD	Jan 24, 2024	n/a	Not reported

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Affected Products

5 affected entries in total

Product	Affected versions	Fixed in
Confluence Data CenterAtlassian	8.7.0, >= >= 8.0.0	8.5.4
Confluence ServerAtlassian	>= >= 8.0.0	8.5.4

Patched Releases

Confluence Data Center

8.5.4

Confluence Server

8.5.4

Timeline

Publicly disclosed
Jan 16, 2024
Added to Industry KEV feed
Jan 19, 2024
Added to CIRCL KEV
Jan 22, 2024
Added to CISA KEV
Jan 24, 2024
Added to ENISA EUVD
Jan 24, 2024
Last updated
Oct 21, 2025

Weakness Type

CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

References

13 more references in the full CVE brief

FAQ

Common Questions.

A template injection vulnerability on older versions of Confluence Data Center and Server allows an unauthenticated attacker to achieve RCE on an affected instance.
Affected: Confluence Data Center (Atlassian) versions 8.7.0, >= >= 8.0.0; Confluence Server (Atlassian) versions >= >= 8.0.0. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jan 19, 2024 and is known to be used in ransomware campaigns.
Yes. It was added on Jan 24, 2024 with a federal remediation due date of Feb 14, 2024.
Public exploit code is available.
Fixed versions are available, including Confluence Data Center 8.5.4, Confluence Server 8.5.4.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

Is CVE-2023-22527 Running On Your Attack Surface?

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