CVE-2021-30112: Web-School ERP V 5.0 contains a cross-site request forgery (CSRF) vulnerability that allows a remote attacker

This month

MEDIUM 6.5DOWNGRADE

CVE-2021-30112 is a medium-severity flaw (CVSS 6.5) affecting enterprise resource planning. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Web-School ERP V 5.0 contains a cross-site request forgery (CSRF) vulnerability that allows a remote attacker to create a student_leave_application request through module/core/studentleaveapplication/create. The application fails to validate the CSRF token for a POST request using Guardian privilege.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.7% (top 45%)
CISA exploited list	No
Weakness	CWE-352
Published	2021-04-08
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: web-school

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

Am I affected?

Timeline

2021-04-08 12:15 UTCPublished CVE record published
2026-06-17 03:49 UTCUpdated Record last modified

web-school enterprise resource planning DOWNGRADE

Affected: 5.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.0

1. Check installed version

apt-cache policy enterprise-resource-planning || rpm -q enterprise-resource-planning || enterprise-resource-planning --version

2. No fixed release: DOWNGRADE to a release before 5.0 (Debian / Ubuntu)

apt-cache madison enterprise-resource-planning sudo apt install enterprise-resource-planning=<VERSION_BEFORE_5.0> sudo apt-mark hold enterprise-resource-planning

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

dnf --showduplicates list enterprise-resource-planning sudo dnf downgrade enterprise-resource-planning-<VERSION_BEFORE_5.0> sudo dnf versionlock add enterprise-resource-planning

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-2021-30112?

enterprise resource planning: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-30112 being exploited?

CVE-2021-30112 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-2021-30112 affect?

CVE-2021-30112 affects enterprise resource planning. Severity is medium (CVSS 6.5). Web-School ERP V 5.0 contains a cross-site request forgery (CSRF) vulnerability that allows a remote attacker to create a student_leave_application request through module/core/studentleaveapplication/create. The application fails to validat

How urgent is CVE-2021-30112?

Priority 41/100. Public exploit reference

Related CVEs

CVE-2022-34001 MEDIUM 6.5 UPGRADE Unit4 ERP through 7.9 allows XXE via ExecuteServerProcessAsynchronously.
CVE-2021-30114 MEDIUM 6.5 DOWNGRADE Web-School ERP V 5.0 contains a cross-site request forgery (CSRF) vulnerability that allows a remote attacker
CVE-2021-30113 MEDIUM 6.1 DOWNGRADE A blind XSS vulnerability exists in Web-School ERP V 5.0 via (Add Events) in event name and description fields
CVE-2021-30111 MEDIUM 5.4 DOWNGRADE A stored XSS vulnerability exists in Web-School ERP V 5.0 via (Add Events) in the event name and description f
CVE-2015-1312 HIGH 7.5 MITIGATE The Dealer Portal in SAP ERP does not properly restrict access, which allows remote attackers to obtain sensit

References

← Back to latest CVEs