All versions of Confluence Data Center and Server are affected by this unexploited vulnerability.
All versions of Confluence Data Center and Server are affected by this unexploited vulnerability. This Improper Authorization vulnerability allows an unauthenticated attacker to reset Confluence and create a Confluence instance administrator account. Using this account, an attacker can then perform all administrative actions that are available to Confluence instance administrator leading to - but not limited to - full loss of confidentiality, integrity and availability. Atlassian Cloud sites are not affected by this vulnerability. If your Confluence site is accessed via an atlassian.net domain, it is hosted by Atlassian and is not vulnerable to this issue.
- Published
- Oct 31, 2023
- Updated
- Jun 17, 2026
- EPSS
- 100.0% · 100th percentile
- CWE
- CWE-863
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Report tools
Action score
99
Now
Patch today or shut off access.
- CVSS
- 39 / 40 · 9.8 / 10
- CISA KEV
- 30 / 30 · Listed
- EPSS
- 30 / 30 · 100.0%
CISA SSVC decision
- Exploitation
- active
- Automatable
- yes
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 9.8
- CNA · atlassian
- 10.0
- 0.2 point gap
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Actively exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on Nov 7, 2023. That signals real attacks, not theory.
Remediation deadline for government agencies: Nov 28, 2023.
Known to be used in ransomware campaigns.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| atlassian | confluence data center | cpe:2.3:a:atlassian:confluence_data_center |
| atlassian | confluence server | cpe:2.3:a:atlassian:confluence_server |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- atlassian confluence data center1.0 and later · before 7.19.16
- atlassian confluence data center7.20.0 and later · before 8.3.4
- atlassian confluence data center8.4.0 and later · before 8.4.4
- atlassian confluence data center8.5.0 and later · before 8.5.3
- atlassian confluence data center8.6.0
- atlassian confluence server1.0 and later · before 7.19.16
- atlassian confluence server7.20.0 and later · before 8.3.4
- atlassian confluence server8.4.0 and later · before 8.4.4
- atlassian confluence server8.5.0 and later · before 8.5.3
- atlassian confluence server8.6.0
Versions reported by the vendor
Affected version ranges reported by the assigning authority (atlassian). Independent of NVD's CPE analysis and usually ahead of it.
Atlassian Confluence Data Center
- >= 1.0.0affected
- < 1.0.0, >= 7.19.16, >= 8.3.4, >= 8.4.4, >= 8.5.3, >= 8.6.1not affected
Atlassian Confluence Server
- >= 1.0.0affected
- < 1.0.0, >= 7.19.16, >= 8.3.4, >= 8.4.4, >= 8.5.3, >= 8.6.1not affected
Same product
atlassian: all recordsOther highest-scoring records for the same primary product.
- CVE-2023-22527A template injection vulnerability on older versions of Confluence Data Center and Server allows an unauthenticated attacker to achieve RCE KEV99Now
- CVE-2023-22515Atlassian has been made aware of an issue reported by a handful of customers where external attackers may have exploited a previously unknowKEV99Now
- CVE-2022-26134In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attackKEV99Now
- CVE-2021-26084In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attackKEV99Now
- CVE-2021-26085Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a Pre-Authorization Arbitrary File KEV81Now
- CVE-2024-21683This High severity RCE (Remote Code Execution) vulnerability was introduced in version 5.2 of Confluence Data Center and Server.61This week
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
Weaponized
A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.
Evidence
- Metasploit module ×1
- Nuclei detection template ×1
- Proof-of-concept repository on GitHub ×8
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Metasploit module | exploit/multi/http/atlassian_confluence_unauth_backupAtlassian Confluence Unauth JSON setup-restore Improper Authorization leading to RCE (CVE-2023-22518)exploit | 2023-10-31 |
| Nuclei detection template | Nuclei template CVE-2023-22518 | — |
| Proof-of-concept repository on GitHub | stars:60 | 2023-10-31 |
| Proof-of-concept repository on GitHub | stars:8 | 2023-11-02 |
| Proof-of-concept repository on GitHub | stars:43 | 2023-11-05 |
| Proof-of-concept repository on GitHub | stars:5 | 2023-11-09 |
| Proof-of-concept repository on GitHub | stars:0 | 2023-11-28 |
| Proof-of-concept repository on GitHub | stars:1 | 2024-01-23 |
| Proof-of-concept repository on GitHub | stars:1 | 2024-03-21 |
| Proof-of-concept repository on GitHub | stars:1 | 2025-05-05 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- First PoCsame day
- Metasploitsame day
- Published
- CISA KEV+7 d
- TodaySep 29, 2026+1064 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2022-42978351 days apartIn the Netic User Export add-on before 1.3.5 for Atlassian Confluence, authorization is mishandled.30Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-863 · Incorrect AuthorizationCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- confluence.atlassian.com/pages/viewpage.action?pageId=1311473907
- jira.atlassian.com/browse/CONFSERVER-93142
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-22518
Vendor advisories and official records. Exploit/PoC links are deliberately left out.