CVE-2023-51321: A lack of rate limiting in the 'Forgot Password' feature of PHPJabbers Night Club Booking Software v1.0 allows

This week

MEDIUM 6.5REMOTEDOWNGRADE

CVE-2023-51321 is a medium-severity flaw (CVSS 6.5) affecting night club booking software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A lack of rate limiting in the 'Forgot Password' feature of PHPJabbers Night Club Booking Software v1.0 allows attackers to send an excessive amount of email for a legitimate user, leading to a possible Denial of Service (DoS) via a large amount of generated e-mail messages.

Why this priority

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	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Weakness	CWE-290
Published	2025-02-20
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

2025-02-20 16:15 UTCPublished CVE record published
2026-06-17 06:40 UTCUpdated Record last modified

phpjabbers night club booking software DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy night-club-booking-software || rpm -q night-club-booking-software || night-club-booking-software --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison night-club-booking-software sudo apt install night-club-booking-software=<VERSION_BEFORE_1.0> sudo apt-mark hold night-club-booking-software

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

dnf --showduplicates list night-club-booking-software sudo dnf downgrade night-club-booking-software-<VERSION_BEFORE_1.0> sudo dnf versionlock add night-club-booking-software

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-2023-51321?

night club booking software: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-51321 being exploited?

CVE-2023-51321 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-2023-51321 affect?

CVE-2023-51321 affects night club booking software. Severity is medium (CVSS 6.5). A lack of rate limiting in the 'Forgot Password' feature of PHPJabbers Night Club Booking Software v1.0 allows attackers to send an excessive amount of email for a legitimate user, leading to a possible Denial of Service (DoS) via a large a

How urgent is CVE-2023-51321?

Priority 41/100. Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2023-51320 MEDIUM 5.3 DOWNGRADE PHPJabbers Night Club Booking Software v1.0 is vulnerable to CSV Injection vulnerability which allows an attac

References

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