CVE-2026-55835: medium-severity vulnerability in lookyloo
Lookyloo: Potential sub-system DoS due to parameter missmatch in notification
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.9epss 0.4%
Lookyloo is a web interface that allows users to capture a website page and then display a tree of domains that call each other. Prior to version 1.39.4, an unauthenticated user can trigger Lookyloo's "report a capture" email on demand (this is expected). The /json/<uuid>/report API endpoint (CaptureReport) is incorrectly passing the email and comment parameters, overwriting as_admin. When True, as_admin will trigger a search query on a MISP instance (if configured) and add a list of matching URLs in the email sent to the analyst (not the submitter, so there is no risk of leaking information) . It could potentially cause a DoS on the MISP instance. This issue has been patched in version 1.39.4.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:L
Affected products
Lookyloo · lookylooRelated CVEs — lookyloo
In the same product, most dangerous first.
CVE-2025-65095CRITICALLookyloo is vulnerable due to improper user input sanitizationEPSS 0.4%CVE-2025-66459MEDIUMLookyloo vulnerable to XSS due to unescaped error message passed to innerHTMLEPSS 0.3%CVE-2025-66460MEDIUMLookyloo vulnerable to XSS due to lack of escaping in HTML elements passed to DatatablesEPSS 0.2%CVE-2025-66458MEDIUMLookyloo has multiple XSS due to unsafe use of f-strings in MarkupEPSS 0.2%