EUVD-2026-62491
GHSA-cxrq-pp78-77qm
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:L/SA:N/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
Network-accessible DoS requiring no credentials or user interaction; description confirms only availability impact with no confidentiality or integrity consequence.
Primary rating from Vendor (Joomla).
CVSS VectorVendor: Joomla
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:L/SA:N/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
Lifecycle Timeline
2DescriptionCVE.org
Joomla Extension - cmsjunkie.com - DOS vector in pagination parameter handling in J-BusinessDirectory < 6.2.3 - Pagination values were not strictly typed. Array/non-numeric values (for example limitstart[]) could trigger PHP type errors in arithmetic, and limit was not validated before use in list queries.
AnalysisAI
Denial-of-service in the J-BusinessDirectory Joomla extension (all versions before 6.2.3) allows unauthenticated remote attackers to crash directory listing pages by supplying array or non-numeric values to pagination parameters such as limitstart[]. PHP arithmetic performed on these malformed inputs triggers fatal type errors, rendering the affected extension inoperable. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No special conditions are required beyond the target site having J-BusinessDirectory below version 6.2.3 installed with the extension's directory listing pages publicly accessible over HTTP. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 base score of 8.7 (AV:N/AC:L/AT:N/PR:N/UI:N/VA:H) accurately reflects the unauthenticated, zero-complexity nature of the attack and the high availability impact on the vulnerable system. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An unauthenticated attacker sends an HTTP GET request to a public Joomla site running J-BusinessDirectory, supplying a malformed pagination parameter such as ?limitstart[]=0&limitstart[]=1. PHP arithmetic on the array value raises a fatal type error in the extension's pagination logic, crashing the directory listing endpoint and returning a 500 error to all users until the process recovers. … |
| Remediation | Upgrade J-BusinessDirectory to version 6.2.3 or later, which enforces strict typing on pagination parameters and validates the limit value before use in list queries. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all instances of J-BusinessDirectory in production and assess the criticality of directory functionality to business operations. …
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External POC / Exploit Code
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