CVE-2021-40261: Multiple Cross Site Scripting (XSS) vulnerabilities exist in SourceCodester CASAP Automated Enrollment System

Routine

MEDIUM 6.1DOWNGRADE

CVE-2021-40261 is a medium-severity flaw (CVSS 6.1) affecting casap automated enrollment system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple Cross Site Scripting (XSS) vulnerabilities exist in SourceCodester CASAP Automated Enrollment System 1.0 via the (1) user_username and (2) category parameters in save_class.php, the (3) firstname, (4) class, and (5) status parameters in student_table.php, the (6) category and (7) class_name parameters in add_class1.php, the (8) fname, (9) mname,(10) lname, (11) address, (12) class, (13) gfname, (14) gmname, (15) glname, (16) rship, (17)

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-11-08
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: casap automated enrollment system project

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

Am I affected?

Timeline

2021-11-08 21:15 UTCPublished CVE record published
2026-06-17 04:06 UTCUpdated Record last modified

casap automated enrollment system project casap automated enrollment 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 casap-automated-enrollment-system || rpm -q casap-automated-enrollment-system || casap-automated-enrollment-system --version

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

apt-cache madison casap-automated-enrollment-system sudo apt install casap-automated-enrollment-system=<VERSION_BEFORE_1.0> sudo apt-mark hold casap-automated-enrollment-system

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

dnf --showduplicates list casap-automated-enrollment-system sudo dnf downgrade casap-automated-enrollment-system-<VERSION_BEFORE_1.0> sudo dnf versionlock add casap-automated-enrollment-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-2021-40261?

casap automated enrollment system: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-40261 being exploited?

CVE-2021-40261 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-2021-40261 affect?

CVE-2021-40261 affects casap automated enrollment system. Severity is medium (CVSS 6.1). Multiple Cross Site Scripting (XSS) vulnerabilities exist in SourceCodester CASAP Automated Enrollment System 1.0 via the (1) user_username and (2) category parameters in save_class.php, the (3) firstname, (4) class, and (5) status paramete

How urgent is CVE-2021-40261?

Priority 39/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2021-3294 MEDIUM 5.4 DOWNGRADE CASAP Automated Enrollment System 1.0 is affected by cross-site scripting (XSS) in users.php
CVE-2021-27332 MEDIUM 6.1 DOWNGRADE Cross-site scripting (XSS) vulnerability in SourceCodester CASAP Automated Enrollment System v 1.0 allows remo
CVE-2021-27129 MEDIUM 5.4 DOWNGRADE CASAP Automated Enrollment System version 1.0 contains a cross-site scripting (XSS) vulnerability through the
CVE-2021-26230 MEDIUM 6.1 DOWNGRADE Cross-site scripting (XSS) vulnerability in SourceCodester CASAP Automated Enrollment System v 1.0 allows remo
CVE-2021-26229 CRITICAL 9.8 DOWNGRADE SQL injection vulnerability in SourceCodester CASAP Automated Enrollment System v 1.0 allows remote attackers

References

← Back to latest CVEs