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Atlassian Confluence Data Center and Server Broken Access Control Vulnerability

Exploited · KEV 2023-10-05RansomwareMetasploit moduleCVE-2023-22515

Exploited since 2023-10-05. 2 of 8 rule sources name it. Our CRS test: not blocked.

Edge rules
2/8
Our test
Not blocked
CVSS
10.0
EPSS
99.2% Top 0.1%
Posts, 14d
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Published
2023-10-04
Atlassian has been made aware of an issue reported by a handful of customers where external attackers may have exploited a previously unknown vulnerability in publicly accessible Confluence Data Center and Server instances to create… More

Atlassian has been made aware of an issue reported by a handful of customers where external attackers may have exploited a previously unknown vulnerability in publicly accessible Confluence Data Center and Server instances to create unauthorized Confluence administrator accounts and access Confluence instances. 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.

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Severity, decoded

CVSS 3.0
Critical · 10.0 / 10

Exploitable over the network, with no privileges and no user interaction, leading to full loss of confidentiality, integrity and availability, and the impact can reach components beyond the vulnerable one.

Over the internetNo login neededNo user actionWorks reliablySpreads beyond the appFull compromise
How the score is built8 metrics
  • Attack vectorAn attacker can reach it over the internet; no access to your network needed.
    Network
  • Attack complexityNo special conditions are needed; the attack works reliably.
    Low
  • Privileges requiredNo account or login is needed.
    None
  • User interactionNo one has to click or open anything; the attack works on its own.
    None
  • ScopeThe attack can spread beyond the vulnerable component to other parts of the system.
    Changed
  • Confidentiality impactAn attacker can read all data the affected component holds, or the most sensitive parts of it.
    High
  • Integrity impactAn attacker can change any data or files the affected component protects.
    High
  • Availability impactAn attacker can take the component down completely or keep it from serving anyone.
    High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA's assessmentSSVC, from the CVE record
ExploitationActive

Attackers are exploiting this in the wild.

AutomatableYes

Attackers can script the attack end to end and hit many targets at once.

Technical impactTotal

A successful attack gives full control over the affected software or all of its data.

Public exploits

3 found
2 Metasploit0 Exploit-DB1 Scanner template0 GitHub PoCs

Links are to third-party code: never run it outside an isolated lab.

Timeline

  1. 2023-10-04
    CVE published
    CVE List
  2. 2023-10-04
    Metasploit module published
    Atlassian Confluence Data Center and Server Authentication Bypass via Broken Access Control
  3. 2023-10-04
    AWS rule names it
    Earliest entry we can see is an update
  4. 2023-10-05
    Added to CISA KEV
    Confirmed exploitation in the wild
  5. 2023-12-12
    F5 ships a rule
    Atlassian Confluence Privilege Escalation (2)
  6. 2026-11-02
    Our test: OWASP Core Rule Set let it through
    paranoia level 1, anomaly threshold 5, default CRS settings
  7. 2026-11-02
    Our test: OWASP Core Rule Set let it through
    paranoia level 2, anomaly threshold 5, default CRS settings

Social

2026-10-20: 0 posts2026-10-21: 0 posts2026-10-22: 0 posts2026-10-23: 0 posts2026-10-24: 0 posts2026-10-25: 0 posts2026-10-26: 0 posts2026-10-27: 0 posts2026-10-28: 0 posts2026-10-29: 0 posts2026-10-30: 0 posts2026-10-31: 0 posts2026-11-01: 0 posts2026-11-02: 0 posts

No posts seen yet on X, Bluesky, Mastodon, Hacker News or GitHub.

Vendor statements

Quoted
CloudflareWAF Managed RulesBefore feed history

The CVE predates the oldest entry in this vendor's public feed, so a rule may exist that we cannot see.

AWSAWS WAF Managed Rules1 quoteRule published

Named by 2023-10-04; the first entry is an update, so the rule may be older.

2023-10-04UpdatedSource
Known bad inputs managed rule group ExploitablePaths_URIPATH: Exception deployment: released static version 1.19 of this rule group. Updated the default version to use version 1.19. Updated the ExploitablePaths_URIPATH rule to add detection for requests matching the Atlassian Confluence CVE-2023-22515 Privilege Escalation Vulnerability. This vulnerability affects some versions of Atlassian Confluence. For more information, see NIST: National Vulnerability Database: CVE-2023-22515 Detail and Atl…
Microsoft AzureFront Door and Application Gateway WAF (DRS)No public claim

We found no public statement from this vendor naming this CVE. That is not proof of no protection: generic rules may still catch it. The rule tables name CVEs but carry no dates, so Azure is left out of every time-to-rule figure.

Google CloudCloud Armor preconfigured WAF rulesBefore feed history

The CVE predates the oldest entry in this vendor's public feed, so a rule may exist that we cannot see.

FastlyNext-Gen WAF virtual patchesBefore feed history

The CVE predates the oldest entry in this vendor's public feed, so a rule may exist that we cannot see.

F5Attack signatures (Distributed Cloud WAF)2 quotesRule published

First rule 2023-12-12, 69 days after the CVE was published.

2023-12-12New rule200013063Source
Added: signature 200013063 "Atlassian Confluence Privilege Escalation (2)" (Authentication/Authorization Attacks, risk High), systems: Java Servlets/JSP. References: CVE-2023-22515, CVE-2023-22518.
2023-12-12New rule200013064Source
Added: signature 200013064 "Atlassian Confluence Privilege Escalation (1)" (Authentication/Authorization Attacks, risk High), systems: Java Servlets/JSP. References: CVE-2023-22515.
AkamaiApp & API Protector (Adaptive Security Engine)No public source

This vendor publishes no machine-readable rule changelog we can check.

OWASP CRSCore Rule Set (open source, used inside many WAFs)No public claim

We found no public statement from this vendor naming this CVE. That is not proof of no protection: generic rules may still catch it. CRS rarely names CVEs: it relies on generic detections. Our own lab measures what it actually blocks.