Threat Intelligence / CVE / CVE-2023-22527

CVE-2023-22527 — atlassian:confluence_server

CISA KEV

CVSS v3.1 9.8 (CRITICAL) · EPSS 94.3% (higher than 99.9% of all scored CVEs) · Priority 9/10 · Published 2024-01-16

As of 2025-10-24, CVE-2023-22527 is a CRITICAL-severity vulnerability in atlassian:confluence_server, CVSS v3.1 9.8, EPSS 94.3% (99.9th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog. Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2023-22527, most recently “APT35 (Charming Kitten) GCC Pre-Positioning Cyber Reconnaissance Campaign Enabling Kinetic Targeting”.

Last updated: 2025-10-24

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.

The record classifies CVE-2023-22527 under weakness class CWE-74. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 2 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 971 days ago.

Severity and exploitation probability

CVSS v3.1 base score: 9.8 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (FIRST): 94.3% probability of exploitation in the next 30 days, higher than 99.9% of all scored CVEs
CISA KEV: Listed
Threadlinqs priority: 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
Published: 2024-01-16, last modified 2025-10-24

Is CVE-2023-22527 being exploited?

CISA added CVE-2023-22527 to the Known Exploited Vulnerabilities catalog, which means the agency holds evidence of exploitation in the wild. It currently carries a trending score of 40 in the Threadlinqs vulnerability feed.

Affected products and versions

(vendor unspecified): atlassian:confluence_server, atlassian:confluence_data_center

How to fix CVE-2023-22527

No vendor patch reference has been recorded for CVE-2023-22527 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2023-22527

1 tracked threat in the Threadlinqs corpus references CVE-2023-22527, either in the campaign’s CVE list or as an indicator on the campaign record.

APT35 (Charming Kitten) GCC Pre-Positioning Cyber Reconnaissance Campaign Enabling Kinetic Targeting — CRITICAL · 2026-04-09

Sources

Seeded from nvd and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.

Full detection coverage & IOCs for threats exploiting CVE-2023-22527 are available via the Threadlinqs MCP server (Purple tier). View plans →

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