How severe is CVE-2023-22527?

CVE-2023-22527 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-22527 being actively exploited?

Yes. CVE-2023-22527 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2024-01-24, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2023-22527?

CVE-2023-22527 primarily affects Atlassian Confluence Data Center. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-22527?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2023-22527 have an EU (EUVD) identifier?

Yes. CVE-2023-22527 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-26667. It is also flagged as exploited in the EUVD (since 2024-01-24).

When was CVE-2023-22527 published?

CVE-2023-22527 was published on 2024-01-16 and last updated on 2026-06-17.

CVE-2023-22527

CVE-2023-22527 is a critical-severity vulnerability in Atlassian Confluence Data Center with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2024-01-24). The underlying weakness is classified as CWE-74.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 100% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2024-01-24)
EU (EUVD) id: EUVD-2023-26667
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2024-01-24)
Weakness: CWE-74
Affected product: Atlassian Confluence Data Center
Published: 2024-01-16
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-22527?: 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.
How severe is CVE-2023-22527?: CVE-2023-22527 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-22527 being actively exploited?: Yes. CVE-2023-22527 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2024-01-24, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2023-22527?: CVE-2023-22527 primarily affects Atlassian Confluence Data Center. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-22527?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2023-22527 have an EU (EUVD) identifier?: Yes. CVE-2023-22527 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-26667. It is also flagged as exploited in the EUVD (since 2024-01-24).
When was CVE-2023-22527 published?: CVE-2023-22527 was published on 2024-01-16 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:8.7.0:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*

More vulnerabilities in Atlassian Confluence Data Center

CVE-2023-22518 — Critical (CVSS 9.8): All versions of Confluence Data Center and Server are affected by this unexploited vulnerability. This Improper…
CVE-2023-22515 — Critical (CVSS 9.8): Atlassian has been made aware of an issue reported by a handful of customers where external attackers may have…
CVE-2022-26136 — Critical (CVSS 9.8): A vulnerability in multiple Atlassian products allows a remote, unauthenticated attacker to bypass Servlet Filters used…
CVE-2022-26134 — Critical (CVSS 9.8): In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an…
CVE-2021-26084 — Critical (CVSS 9.8): In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an…
CVE-2024-21683 — High (CVSS 8.8): This High severity RCE (Remote Code Execution) vulnerability was introduced in version 5.2 of Confluence Data Center…

All CVEs affecting Atlassian Confluence Data Center →

Other CWE-74 (Improper Neutralization of Special Elements (Injection)) vulnerabilities

CVE-2026-54159 — Critical (CVSS 10.0): PrestaShop ps_facetedsearch is a module that adds layered navigation filters. From 3.0.0 until 4.0.4, the…
CVE-2026-44182 — Critical (CVSS 10.0): Jupyter Enterprise Gateway launches remote Jupyter Notebook kernels across distributed clusters like Apache Spark,…
CVE-2026-25586 — Critical (CVSS 10.0): SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, a sandbox escape is possible by shadowing hasOwnProperty…
CVE-2026-25520 — Critical (CVSS 10.0): SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, The return values of functions aren't wrapped.…
CVE-2025-20265 — Critical (CVSS 10.0): A vulnerability in the RADIUS subsystem implementation of Cisco Secure Firewall Management Center (FMC) Software could…
CVE-2025-20337 — Critical (CVSS 10.0): A vulnerability in a specific API of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker to…

Browse all CWE-74 (Improper Neutralization of Special Elements (Injection)) vulnerabilities →