CVE-2021-35337: Sourcecodester Phone Shop Sales Managements System 1.0 is vulnerable to Insecure Direct Object Reference (IDOR

Routine

MEDIUM 4.3DOWNGRADE

CVE-2021-35337 is a medium-severity flaw (CVSS 4.3) affecting phone shop sales management system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Sourcecodester Phone Shop Sales Managements System 1.0 is vulnerable to Insecure Direct Object Reference (IDOR). Any attacker will be able to see the invoices of different users by changing the id parameter.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-639
Published	2021-07-01
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: phone shop sales management system project

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

Am I affected?

Timeline

2021-07-01 14:15 UTCPublished CVE record published
2026-06-17 03:57 UTCUpdated Record last modified

phone shop sales management system project phone shop sales management 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 phone-shop-sales-management-system || rpm -q phone-shop-sales-management-system || phone-shop-sales-management-system --version

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

apt-cache madison phone-shop-sales-management-system sudo apt install phone-shop-sales-management-system=<VERSION_BEFORE_1.0> sudo apt-mark hold phone-shop-sales-management-system

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

dnf --showduplicates list phone-shop-sales-management-system sudo dnf downgrade phone-shop-sales-management-system-<VERSION_BEFORE_1.0> sudo dnf versionlock add phone-shop-sales-management-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-2021-35337?

phone shop sales management system: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-35337 being exploited?

CVE-2021-35337 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-2021-35337 affect?

CVE-2021-35337 affects phone shop sales management system. Severity is medium (CVSS 4.3). Sourcecodester Phone Shop Sales Managements System 1.0 is vulnerable to Insecure Direct Object Reference (IDOR). Any attacker will be able to see the invoices of different users by changing the id parameter.

How urgent is CVE-2021-35337?

Priority 34/100. Public exploit reference

Related CVEs

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CVE-2021-36560 CRITICAL 9.8 DOWNGRADE Phone Shop Sales Managements System using PHP with Source Code 1.0 is vulnerable to authentication bypass whic

References

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