CVE-2023-48834Public exploitNetwork attack vector

Unauthenticated service interruption via unlimited email requests

Published Dec 7, 2023 · Updated May 28, 2025

Uncontrolled resource consumption in PHPJabbers Car Rental Script 3.0 allows remote attackers to exhaust server resources without authentication. The pjActionAjaxSend email action accepts repeated requests without rate limiting, allowing each request to trigger resource-consuming email processing. A network-reachable booking deployment is sufficient; sustained unauthenticated requests can interrupt service, with no reported confidentiality or integrity impact.

CVSS severity7.5
High
EPSS probability1.05%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in PHPJabbers Car Rental Script 3.0 allows remote attackers to exhaust server resources without authentication. The pjActionAjaxSend email action accepts repeated requests without rate limiting, allowing each request to trigger resource-consuming email processing. A network-reachable booking deployment is sufficient; sustained unauthenticated requests can interrupt service, with no reported confidentiality or integrity impact.

The record

CVE
CVE-2023-48834
Published
Dec 7, 2023
Updated
May 28, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 7, 2023CVE publishedPublication date reported by the CVE source.
  2. May 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.003Application Exhaustion Flood

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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