CVE-2021-34249: SQL injection vulnerability in sourcecodester online-book-store 1.0 allows remote attackers to view sensitive

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2021-34249 is a high-severity flaw (CVSS 7.5) affecting online book store. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SQL injection vulnerability in sourcecodester online-book-store 1.0 allows remote attackers to view sensitive information via the id paremeter in application URL.

Why this priority

High 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	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 31%)
CISA exploited list	No
Weakness	CWE-89
Published	2023-02-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: online book store project

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

Am I affected?

Timeline

2023-02-24 21:15 UTCPublished CVE record published
2026-06-17 03:55 UTCUpdated Record last modified

online book store project online book store 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 online-book-store || rpm -q online-book-store || online-book-store --version

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

apt-cache madison online-book-store sudo apt install online-book-store=<VERSION_BEFORE_1.0> sudo apt-mark hold online-book-store

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

dnf --showduplicates list online-book-store sudo dnf downgrade online-book-store-<VERSION_BEFORE_1.0> sudo dnf versionlock add online-book-store

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-2021-34249?

online book store: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-34249 being exploited?

CVE-2021-34249 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-2021-34249 affect?

CVE-2021-34249 affects online book store. Severity is high (CVSS 7.5). SQL injection vulnerability in sourcecodester online-book-store 1.0 allows remote attackers to view sensitive information via the id paremeter in application URL.

How urgent is CVE-2021-34249?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-9700 HIGH 7.3 DOWNGRADE A flaw has been found in SourceCodester Online Book Store 1.0

References

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