CVE-2020-36112: CSE Bookstore version 1.0 is vulnerable to time-based blind, boolean-based blind and OR error-based SQL inject

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CRITICAL 9.8REMOTEDOWNGRADE

CVE-2020-36112 is a critical-severity flaw (CVSS 9.8) affecting cse bookstore. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CSE Bookstore version 1.0 is vulnerable to time-based blind, boolean-based blind and OR error-based SQL injection in pubid parameter in bookPerPub.php and in cart.php. A successful exploitation of this vulnerability will lead to an attacker dumping the entire database on which the web application is running.

Why this priority

Critical severity
EPSS top 3%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	17.6% (top 3%)
CISA exploited list	No
Weakness	CWE-89
Published	2021-01-04
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cse bookstore project

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

Am I affected?

Timeline

2021-01-04 15:15 UTCPublished CVE record published
2026-06-17 03:14 UTCUpdated Record last modified

cse bookstore project cse bookstore 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 cse-bookstore || rpm -q cse-bookstore || cse-bookstore --version

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

apt-cache madison cse-bookstore sudo apt install cse-bookstore=<VERSION_BEFORE_1.0> sudo apt-mark hold cse-bookstore

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

dnf --showduplicates list cse-bookstore sudo dnf downgrade cse-bookstore-<VERSION_BEFORE_1.0> sudo dnf versionlock add cse-bookstore

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.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · root · FIXED · 6.40.04-7.fc46 · FEDORA-2026-7329868400 · source

sudo dnf upgrade --advisory=FEDORA-2026-7329868400

Public exploits and detection

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

Write-up: www.exploit-db.com/exploits/49314
Nuclei scan template: CSE Bookstore 1.0 - 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-2020-36112?

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

Is CVE-2020-36112 being exploited?

CVE-2020-36112 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-2020-36112 affect?

CVE-2020-36112 affects cse bookstore. Severity is critical (CVSS 9.8). CSE Bookstore version 1.0 is vulnerable to time-based blind, boolean-based blind and OR error-based SQL injection in pubid parameter in bookPerPub.php and in cart.php. A successful exploitation of this vulnerability will lead to an attacker

How urgent is CVE-2020-36112?

Priority 69/100. Critical severity; EPSS top 3%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

References

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