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CVE-2025-22166

This High severity DoS (Denial of Service) vulnerability was introduced in version 2.0 of Confluence Data Center. This DoS (Denial of…

Description

This High severity DoS (Denial of Service) vulnerability was introduced in version 2.0 of Confluence Data Center. This DoS (Denial of Service) vulnerability, with a CVSS Score of 8.3, allows an attacker to cause a resource to be unavailable for its intended users by temporarily or indefinitely disrupting services of a host connected to a network. Atlassian recommends that Confluence Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions: Confluence Data Center and Server 8.5: Upgrade to a release greater than or equal to 8.5.25 Confluence Data Center and Server 9.2: Upgrade to a release greater than or equal to 9.2.7 Confluence Data Center and Server 10.0: Upgrade to a release greater than or equal to 10.0.2 See the release notes ([https://confluence.atlassian.com/doc/confluence-release-notes-327.html]). You can download the latest version of Confluence Data Center from the download center ([https://www.atlassian.com/software/confluence/download-archives]). This vulnerability was reported via our Atlassian (Internal) program.

Timeline

  1. ID reserved

    By atlassian

  2. · 10 months later

    Published

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2025-22166, by who scored it
Scored byCVSSScoreVector
atlassianCNA (assigner)4.0High8.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
NVDNVD · Analyzed4.0High8.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS (exploitation in 30 days)
0.52% · top 56% of all CVEs (11 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.3.

Affected products

  • Atlassian · Confluence Data Center

    • affected 9.5.1 to 9.5.4
    • affected 9.4.0 to 9.4.1
    • affected 9.3.1 to 9.3.2
    • affected 9.2.0 to 9.2.6
    • affected 9.1.0 to 9.1.1
    • affected 9.0.1 to 9.0.3
    • affected 8.9.0 to 8.9.8
    • affected 8.8.0 to 8.8.1
    • affected 8.7.1 to 8.7.2
    • affected 8.6.1 to 8.6.2
    • affected 8.5.3 to 8.5.24
    • affected 7.19.16 to 7.19.30
    • unaffected 10.0.2 to 10.0.3
    • unaffected 9.2.7 to 9.2.9
    • unaffected 8.5.25 to 8.5.27

References

References2

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .