Is CVE-2026-6909 actively exploited?

No active exploitation of CVE-2026-6909 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-6909 be exploited remotely?

Yes. CVE-2026-6909 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-6909?

CVE-2026-6909 has a CVSS score of 5.1 (MEDIUM).

HOME VULNERABILITIESCVE-2026-6909

MEDIUM

CVE-2026-6909

CWE-79Published: May 11, 2026· Updated: May 12, 2026

5.1

CVSS v3.1

EPSS:0.08%probability of exploitation in 30 daysPercentile:22.8th

Official Description

ATutor is vulnerable to Reflected XSS in /install/upgrade.php endpoint. An attacker can provide a specially crafted URL that, when opened, results in arbitrary JavaScript execution in the victim's browser.

Product is no longer actively supported. Maintainers of this project were notified early about this vulnerability, but did not respond with the details of the vulnerability or vulnerable version range. Only version 2.2.4 was tested and confirmed as vulnerable, other versions were not tested but might also be vulnerable.

NVD Source

Technical Analysis

CVE-2026-6909 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (A) is needed, which slightly reduces the risk of mass automated attacks.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionA

ScopeX

Impact

Confidentiality

Integrity

Availability

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X