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

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2020-25763 is a critical-severity flaw (CVSS 9.8) affecting seat reservation system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Seat Reservation System version 1.0 suffers from an Unauthenticated File Upload Vulnerability allowing Remote Attackers to gain Remote Code Execution (RCE) on the Hosting Webserver via uploading PHP files.

Why this priority

Critical severity
EPSS top 8%: 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	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	5.0% (top 8%)
CISA exploited list	No
Weakness	CWE-434
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.

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-2020-25763?

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

Is CVE-2020-25763 being exploited?

CVE-2020-25763 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-2020-25763 affect?

CVE-2020-25763 affects seat reservation system. Severity is critical (CVSS 9.8). Seat Reservation System version 1.0 suffers from an Unauthenticated File Upload Vulnerability allowing Remote Attackers to gain Remote Code Execution (RCE) on the Hosting Webserver via uploading PHP files.

How urgent is CVE-2020-25763?

Priority 67/100. Critical severity; EPSS top 8%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2020-25762 CRITICAL 9.1 DOWNGRADE An issue was discovered in SourceCodester Seat Reservation System 1.0

References

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