PT-2026-39590 · Atutor · Atutor

Marcin Wyczechowski + 2 · Published 2026-05-11 · Updated 2026-05-13 · CVE-2026-6909

Positive Technologies (AI Summary)

CVSS v4.0

5.1

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Name of the Vulnerable Software and Affected Versions ATutor version 2.2.4

Description A Reflected Cross-Site Scripting (XSS) issue exists in the '/install/upgrade.php' endpoint. This allows an attacker to execute arbitrary JavaScript in a victim's browser by providing a specially crafted URL.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-6909

Affected Products

Atutor

References · 10

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/6xxx/CVE-2026-6909.json · Exploit
• https://osv.dev/vulnerability/CVE-2026-6909 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-6909 · Security Note
• https://github.com/atutor/ATutor · Note
• https://t.me/CVEtracker/53369 · Telegram Post
• https://cert.pl/en/posts/2026/05/CVE-2026-6909 · Note
• https://t.me/true_secator/8200 · Telegram Post
• https://twitter.com/VulmonFeeds/status/2053787593968394566 · Twitter Post
• https://atutor.github.io · Note
• https://twitter.com/CVEnew/status/2053954486117220358 · Twitter Post