CVE-2021-37331: Laravel Booking System Booking Core 2.0 is vulnerable to Incorrect Access Control

This week

MEDIUM 5.3REMOTEDOWNGRADE

CVE-2021-37331 is a medium-severity flaw (CVSS 5.3) affecting booking core. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Laravel Booking System Booking Core 2.0 is vulnerable to Incorrect Access Control. On the Verifications page, after uploading an ID Card or Trade License and viewing it, ID Cards and Trade Licenses of other vendors/users can be viewed by changing the URL.

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	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-639
Published	2021-10-04
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: bookingcore

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

Am I affected?

Timeline

2021-10-04 14:15 UTCPublished CVE record published
2026-06-17 04:00 UTCUpdated Record last modified

bookingcore booking core DOWNGRADE

Affected: 2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0

1. Check installed version

apt-cache policy booking-core || rpm -q booking-core || booking-core --version

2. No fixed release: DOWNGRADE to a release before 2.0 (Debian / Ubuntu)

apt-cache madison booking-core sudo apt install booking-core=<VERSION_BEFORE_2.0> sudo apt-mark hold booking-core

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

dnf --showduplicates list booking-core sudo dnf downgrade booking-core-<VERSION_BEFORE_2.0> sudo dnf versionlock add booking-core

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-2021-37331?

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

Is CVE-2021-37331 being exploited?

CVE-2021-37331 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-2021-37331 affect?

CVE-2021-37331 affects booking core. Severity is medium (CVSS 5.3). Laravel Booking System Booking Core 2.0 is vulnerable to Incorrect Access Control. On the Verifications page, after uploading an ID Card or Trade License and viewing it, ID Cards and Trade Licenses of other vendors/users can be viewed by ch

How urgent is CVE-2021-37331?

Priority 44/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Laravel vulnerabilities

Related CVEs

CVE-2021-37333 CRITICAL 9.8 DOWNGRADE Laravel Booking System Booking Core 2.0 is vulnerable to Session Management
CVE-2021-37330 MEDIUM 5.4 DOWNGRADE Laravel Booking System Booking Core 2.0 is vulnerable to Cross Site Scripting (XSS)
CVE-2020-27379 MEDIUM 6.5 DOWNGRADE Cross Site Request Forgery (CSRF) vulnerability in Booking Core - Ultimate Booking System Booking Core 1.7.0
CVE-2020-25445 HIGH 7.8 DOWNGRADE The “Subscribe” feature in Ultimate Booking System Booking Core 1.7.0 is vulnerable to CSV formula injection
CVE-2020-25444 MEDIUM 5.4 DOWNGRADE Cross Site Scripting (XSS) vulnerability in Booking Core - Ultimate Booking System Booking Core 1.7.0 via the

References

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