CVE-2023-2826: A vulnerability has been found in SourceCodester Class Scheduling System 1.0 and classified as problematic

Routine

LOW 3.5DOWNGRADE

CVE-2023-2826 is a low-severity flaw (CVSS 3.5) affecting class scheduling system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability has been found in SourceCodester Class Scheduling System 1.0 and classified as problematic. This vulnerability affects unknown code of the file search_teacher_result.php of the component POST Parameter Handler. The manipulation of the argument teacher leads to cross site scripting. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-229612.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	3.5 (Low)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.7% (top 49%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-05-21
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: class scheduling system project

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

Am I affected?

Timeline

2023-05-21 08:15 UTCPublished CVE record published
2026-06-17 05:53 UTCUpdated Record last modified

class scheduling system project class scheduling 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 class-scheduling-system || rpm -q class-scheduling-system || class-scheduling-system --version

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

apt-cache madison class-scheduling-system sudo apt install class-scheduling-system=<VERSION_BEFORE_1.0> sudo apt-mark hold class-scheduling-system

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

dnf --showduplicates list class-scheduling-system sudo dnf downgrade class-scheduling-system-<VERSION_BEFORE_1.0> sudo dnf versionlock add class-scheduling-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-2023-2826?

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

Is CVE-2023-2826 being exploited?

CVE-2023-2826 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-2023-2826 affect?

CVE-2023-2826 affects class scheduling system. Severity is low (CVSS 3.5). A vulnerability has been found in SourceCodester Class Scheduling System 1.0 and classified as problematic. This vulnerability affects unknown code of the file search_teacher_result.php of the component POST Parameter Handler. The manipulat

How urgent is CVE-2023-2826?

Priority 30/100. Public exploit reference

Software pages

PHP vulnerabilities

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References

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