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Joomla! Improper Access Control Vulnerability

Exploited · KEV 2024-01-08Metasploit moduleCVE-2023-23752CWE-284

Exploited since 2024-01-08. 1 of 8 rule sources name it. Our CRS test: not blocked.

Edge rules
1/8
Our test
Not blocked
CVSS
5.3
EPSS
99.8% Top 0.1%
Posts, 14d
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Published
2023-02-16

An issue was discovered in Joomla! 4.0.0 through 4.2.7. An improper access check allows unauthorized access to webservice endpoints.

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Ask about CVE-2023-23752: who's covered, what to patch first, how vendors compare. I cite sources and won't help with attacks.

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Severity, decoded

CVSS 3.1
Medium · 5.3 / 10

Exploitable over the network, with no privileges and no user interaction, leading to low impact on confidentiality.

Over the internetNo login neededNo user actionWorks reliably
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 damage stays within the vulnerable component.
    Unchanged
  • Confidentiality impactAn attacker can read some data, but has no control over what they get.
    Low
  • Integrity impactData cannot be changed by the attacker.
    None
  • Availability impactThe component keeps working normally.
    None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
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 impactPartial

A successful attack gives limited control over the affected software or limited access to its data.

Public exploits

3 found
1 Metasploit1 Exploit-DB1 Scanner template0 GitHub PoCs

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

Timeline

  1. 2023-02-01
    Metasploit module published
    Joomla API Improper Access Checks
  2. 2023-02-16
    CVE published
    CVE List
  3. 2023-03-14
    F5 ships a rule
    Joomla! webservice endpoint unauthorized access
  4. 2023-04-08
    Exploit published on Exploit-DB
    Joomla! v4.2.8 - Unauthenticated information disclosure
  5. 2024-01-08
    Added to CISA KEV
    Confirmed exploitation in the wild
  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 RulesNo 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. AWS often describes a vulnerability without naming its CVE (for example "Log4j"). We count only entries that name the CVE, so AWS coverage is understated.

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)3 quotesRule published

First rule 2023-03-14, 26 days after the CVE was published.

2023-03-14New rule200010472Source
Added: signature 200010472 "Joomla! webservice endpoint unauthorized access" (Predictable Resource Location, risk Medium), systems: PHP, Joomla. References: CVE-2023-23752.
2023-05-09New rule200014027Source
Added: signature 200014027 "Joomla! Webservice Unauthorized Access" (Abuse of Functionality, risk Medium), systems: PHP, Joomla. References: CVE-2023-23752.
2025-12-03Updated200014027Source
Updated: signature 200014027 "Joomla! Webservice Unauthorized Access" (Abuse of Functionality, risk Medium), systems: PHP, Joomla. References: CVE-2023-23752.
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.