CVE-2026-40039
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk27th percentile - higher than 27% of all known CVEs
Summary
Pachno 1.0.6 contains an open redirection vulnerability that allows attackers to redirect users to arbitrary external websites by manipulating the return_to parameter. Attackers can craft malicious login URLs with unvalidated return_to values to conduct phishing attacks and steal user credentials.
Risk Assessment
Users may be redirected to fake login pages and lose their credentials. Abuse of trust in the Pachno domain increases phishing effectiveness.
Recommendation
Update Pachno to a version containing the fix or implement validation of the return_to parameter restricting redirects to allowed local addresses only. Inform users about the phishing risk.
Other vulnerabilities in Pachno
See all- CVE-2026-40043Medium
Pachno 1.0.6 contains an authentication bypass vulnerability in the runSwitchUser() action that allows authenticated low-privilege users to escalate privileges by manipulating the original_username cookie. Attackers can set the client-controlled original_username cookie to any value and request a switch to user ID 1 to obtain session tokens or password hashes belonging to administrator accounts.
- CVE-2026-40041Medium
Pachno 1.0.6 contains a CSRF vulnerability that allows attackers to perform arbitrary actions in an authenticated user's context by exploiting missing CSRF protections on state-changing endpoints. Attackers can craft malicious requests targeting login, registration, file upload, milestone editing, and administrative functions.
Original NVD description (English source)
Pachno 1.0.6 contains an open redirection vulnerability that allows attackers to redirect users to arbitrary external websites by manipulating the return_to parameter. Attackers can craft malicious login URLs with unvalidated return_to values to conduct phishing attacks and steal user credentials.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS