CVE-2023-53877: Bus Reservation System 1.1 contains a SQL injection vulnerability in the pickup_id parameter that allows attac

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2023-53877 is a critical-severity flaw (CVSS 9.8) affecting bus reservation system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Bus Reservation System 1.1 contains a SQL injection vulnerability in the pickup_id parameter that allows attackers to manipulate database queries. Attackers can exploit boolean-based, error-based, and time-based blind SQL injection techniques to steal information from the database.

Why this priority

Critical 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	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 61%)
CISA exploited list	No
Weakness	CWE-89
Published	2025-12-15
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: phpjabbers

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

Am I affected?

Timeline

2025-12-15 21:15 UTCPublished CVE record published
2026-06-17 06:46 UTCUpdated Record last modified

phpjabbers bus reservation system DOWNGRADE

Affected: 1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1

1. Check installed version

apt-cache policy bus-reservation-system || rpm -q bus-reservation-system || bus-reservation-system --version

2. No fixed release: DOWNGRADE to a release before 1.1 (Debian / Ubuntu)

apt-cache madison bus-reservation-system sudo apt install bus-reservation-system=<VERSION_BEFORE_1.1> sudo apt-mark hold bus-reservation-system

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

dnf --showduplicates list bus-reservation-system sudo dnf downgrade bus-reservation-system-<VERSION_BEFORE_1.1> sudo dnf versionlock add bus-reservation-system

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-2023-53877?

bus reservation system: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-53877 being exploited?

CVE-2023-53877 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-2023-53877 affect?

CVE-2023-53877 affects bus reservation system. Severity is critical (CVSS 9.8). Bus Reservation System 1.1 contains a SQL injection vulnerability in the pickup_id parameter that allows attackers to manipulate database queries. Attackers can exploit boolean-based, error-based, and time-based blind SQL injection techniqu

How urgent is CVE-2023-53877?

Priority 54/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

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References

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