CVE-2020-25762: An issue was discovered in SourceCodester Seat Reservation System 1.0

This week

CRITICAL 9.1REMOTEDOWNGRADE

CVE-2020-25762 is a critical-severity flaw (CVSS 9.1) affecting seat reservation system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in SourceCodester Seat Reservation System 1.0. The file admin_class.php does not perform input validation on the username and password parameters. An attacker can send malicious input in the post request to /admin/ajax.php?action=login and bypass authentication, extract sensitive information etc.

Why this priority

Critical severity
EPSS top 4%: very likely to be exploited
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	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	11.3% (top 4%)
CISA exploited list	No
Weakness	CWE-89
Published	2020-09-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: seat reservation system project

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

Am I affected?

Timeline

2020-09-30 18:15 UTCPublished CVE record published
2026-06-17 03:07 UTCUpdated Record last modified

seat reservation system project seat reservation system 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 seat-reservation-system || rpm -q seat-reservation-system || seat-reservation-system --version

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

apt-cache madison seat-reservation-system sudo apt install seat-reservation-system=<VERSION_BEFORE_1.0> sudo apt-mark hold seat-reservation-system

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

dnf --showduplicates list seat-reservation-system sudo dnf downgrade seat-reservation-system-<VERSION_BEFORE_1.0> sudo dnf versionlock add seat-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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Seat Reservation System 1.0 - Unauthenticated SQL Injection

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-2020-25762?

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

Is CVE-2020-25762 being exploited?

CVE-2020-25762 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-2020-25762 affect?

CVE-2020-25762 affects seat reservation system. Severity is critical (CVSS 9.1). An issue was discovered in SourceCodester Seat Reservation System 1.0. The file admin_class.php does not perform input validation on the username and password parameters. An attacker can send malicious input in the post request to /admin/aj

How urgent is CVE-2020-25762?

Priority 66/100. Critical severity; EPSS top 4%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2020-25763 CRITICAL 9.8 DOWNGRADE Seat Reservation System version 1.0 suffers from an Unauthenticated File Upload Vulnerability allowing Remote

References

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