CVE-2020-23341: A reflected cross site scripting (XSS) vulnerability in the /header.tmpl.php component of ATutor 2.2.4 allows

Q: How do I fix CVE-2020-23341?

atutor: upgrade to newer than 2.2.4. Exact commands for each OS are on this page.

Q: Is CVE-2020-23341 being exploited?

CVE-2020-23341 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-23341 affect?

CVE-2020-23341 affects atutor. Severity is medium (CVSS 6.1). A reflected cross site scripting (XSS) vulnerability in the /header.tmpl.php component of ATutor 2.2.4 allows attackers to execute arbitrary web scripts or HTML via a crafted payload.

Q: How urgent is CVE-2020-23341?

Priority 41/100. Public exploit reference

This month

MEDIUM 6.1UPGRADE

CVE-2020-23341 is a medium-severity flaw (CVSS 6.1) affecting atutor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A reflected cross site scripting (XSS) vulnerability in the /header.tmpl.php component of ATutor 2.2.4 allows attackers to execute arbitrary web scripts or HTML via a crafted payload.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-08-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: atutor

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

Am I affected?

Timeline

2021-08-17 22:15 UTCPublished CVE record published
2026-06-17 03:04 UTCUpdated Record last modified

atutor atutor UPGRADE

Affected: <= 2.2.4

Fixed in: newer than 2.2.4

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 2.2.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade atutor

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade atutor

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2020-23341?

atutor: upgrade to newer than 2.2.4. Exact commands for each OS are on this page.

Is CVE-2020-23341 being exploited?

CVE-2020-23341 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-2020-23341 affect?

CVE-2020-23341 affects atutor. Severity is medium (CVSS 6.1). A reflected cross site scripting (XSS) vulnerability in the /header.tmpl.php component of ATutor 2.2.4 allows attackers to execute arbitrary web scripts or HTML via a crafted payload.

How urgent is CVE-2020-23341?

Priority 41/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2023-27008 MEDIUM 6.1 DOWNGRADE A Cross-site scripting (XSS) vulnerability in the function encrypt_password() in login.tmpl.php in ATutor 2.2.
CVE-2021-43498 HIGH 7.5 DOWNGRADE An Access Control vulnerability exists in ATutor 2.2.4 in password_reminder.php when the g, id, h, form_passwo
CVE-2019-7172 MEDIUM 6.1 UPGRADE A stored-self XSS exists in ATutor through v2.2.4, allowing an attacker to execute HTML or JavaScript code in
CVE-2019-12170 HIGH 8.8 UPGRADE ATutor through 2.2.4 is vulnerable to arbitrary file uploads via the mods/_core/backups/upload.php (aka backup
CVE-2019-12169 HIGH 8.8 UPGRADE ATutor 2.2.4 allows Arbitrary File Upload and Directory Traversal, resulting in remote code execution via a ".

References

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