{"vulnerability": "cve-2020-26891", "sightings": [{"uuid": "25b2dd37-a4ec-493b-951c-69e696160da0", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2020-26891", "type": "seen", "source": "https://t.me/cibsecurity/15380", "content": "\u203c CVE-2020-26891 \u203c\n\nAuthRestServlet in Matrix Synapse before 1.21.0 is vulnerable to XSS due to unsafe interpolation of the session GET parameter. This allows a remote attacker to execute an XSS attack on the domain Synapse is hosted on, by supplying the victim user with a malicious URL to the /_matrix/client/r0/auth/m.login.recaptcha or /_matrix/client/r0/auth/m.login.terms Synapse 974923.\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2020-10-19T20:46:19.000000Z"}]}