CVE-2022-46087: CloudSchool v3.0.1 is vulnerable to Cross Site Scripting (XSS)

Routine

MEDIUM 5.4DOWNGRADE

CVE-2022-46087 is a medium-severity flaw (CVSS 5.4) affecting cloudschool. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CloudSchool v3.0.1 is vulnerable to Cross Site Scripting (XSS). A normal user can steal session cookies of the admin users through notification received by the admin user.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.6% (top 51%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-01-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cloudschool project

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

Am I affected?

Timeline

2023-01-30 15:15 UTCPublished CVE record published
2026-06-17 05:11 UTCUpdated Record last modified

cloudschool project cloudschool DOWNGRADE

Affected: 3.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0.1

1. Check installed version

apt-cache policy cloudschool || rpm -q cloudschool || cloudschool --version

2. No fixed release: DOWNGRADE to a release before 3.0.1 (Debian / Ubuntu)

apt-cache madison cloudschool sudo apt install cloudschool=<VERSION_BEFORE_3.0.1> sudo apt-mark hold cloudschool

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

dnf --showduplicates list cloudschool sudo dnf downgrade cloudschool-<VERSION_BEFORE_3.0.1> sudo dnf versionlock add cloudschool

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-2022-46087?

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

Is CVE-2022-46087 being exploited?

CVE-2022-46087 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-2022-46087 affect?

CVE-2022-46087 affects cloudschool. Severity is medium (CVSS 5.4). CloudSchool v3.0.1 is vulnerable to Cross Site Scripting (XSS). A normal user can steal session cookies of the admin users through notification received by the admin user.

How urgent is CVE-2022-46087?

Priority 36/100. Public exploit reference

References

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