This High severity DoS (Denial of Service) vulnerability was introduced in version 2.0 of Confluence Data Center
Published Oct 21, 2025
8.3
HIGHCVSS 4.0
EPSS 0.51%
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.
Affected products
-
- Version 7.19.16 to 7.19.30StatusaffectedConstraints-
- Version 8.5.3 to 8.5.24StatusaffectedConstraints-
- Version 8.6.1 to 8.6.2StatusaffectedConstraints-
- Version 8.7.1 to 8.7.2StatusaffectedConstraints-
- Version 8.8.0 to 8.8.1StatusaffectedConstraints-
- Version 8.9.0 to 8.9.8StatusaffectedConstraints-
- Version 9.0.1 to 9.0.3StatusaffectedConstraints-
- Version 9.1.0 to 9.1.1StatusaffectedConstraints-
- Version 9.2.0 to 9.2.6StatusaffectedConstraints-
- Version 9.3.1 to 9.3.2StatusaffectedConstraints-
- Version 9.4.0 to 9.4.1StatusaffectedConstraints-
- Version 9.5.1 to 9.5.4StatusaffectedConstraints-
- Version 10.0.2 to 10.0.3StatusunaffectedConstraints-
- Version 8.5.25 to 8.5.27StatusunaffectedConstraints-
- Version 9.2.7 to 9.2.9StatusunaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Atlassian | Confluence Data Center | n/a |
|
- ≥ 8.5.0 · < 8.5.25
- ≥ 9.2.0 · < 9.2.7
- ≥ 10.0.0 · < 10.0.2
- ≥ 8.5.0 · < 8.5.25
- ≥ 9.2.0 · < 9.2.7
- ≥ 10.0.0 · < 10.0.2
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
1 other source (NVD) ▾
CVSS: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
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Oct 21, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2025–2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.51% (0.00507) | 41.17th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.42% (0.00420) | 33.30th | v5 (v2026.06.15) |
| Oct 22, 2025 | 0.05% (0.00052) | 16.02th | v4 (v2025.03.14) |
References (2)
- https://confluence.atlassian.com/pages/viewpage.action?pageId=1652920034 Vendor Advisory
- https://jira.atlassian.com/browse/CONFSERVER-100907 Vendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://confluence.atlassian.com/pages/viewpage.action?pageId=1652920034 | Vendor Advisory | |
| https://jira.atlassian.com/browse/CONFSERVER-100907 | Vendor Advisory |
Change history (0)
No recorded changes yet.