CVE-2023-48834: A lack of rate limiting in pjActionAjaxSend in Car Rental v3.0 allows attackers to cause resource exhaustion.

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2023-48834 is a high-severity flaw (CVSS 7.5) affecting car rental script. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A lack of rate limiting in pjActionAjaxSend in Car Rental v3.0 allows attackers to cause resource exhaustion.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 36%)
CISA exploited list	No
Weakness	CWE-400
Published	2023-12-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: phpjabbers

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-12-07 07:15 UTCPublished CVE record published
2026-06-17 06:35 UTCUpdated Record last modified

phpjabbers car rental script DOWNGRADE

Affected: 3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0

1. Check installed version

apt-cache policy car-rental-script || rpm -q car-rental-script || car-rental-script --version

2. No fixed release: DOWNGRADE to a release before 3.0 (Debian / Ubuntu)

apt-cache madison car-rental-script sudo apt install car-rental-script=<VERSION_BEFORE_3.0> sudo apt-mark hold car-rental-script

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list car-rental-script sudo dnf downgrade car-rental-script-<VERSION_BEFORE_3.0> sudo dnf versionlock add car-rental-script

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-48834?

car rental script: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-48834 being exploited?

CVE-2023-48834 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-48834 affect?

CVE-2023-48834 affects car rental script. Severity is high (CVSS 7.5). A lack of rate limiting in pjActionAjaxSend in Car Rental v3.0 allows attackers to cause resource exhaustion.

How urgent is CVE-2023-48834?

Priority 52/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

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References

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