the-draupnir-project/Draupnir
Hijack command doesn't work when MSC3861 is in use
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#986 opened on Oct 25, 2025
L3 Some UsersP3 Outrageous / Cannot continue to or start to useServer AdminT5 Major usabilitybuggood first issue
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Description
When trying to use the hijack room command with a Synapse that delegates auth to MAS using MSC3861, an error occurs:
Oct 25 20:07:24 matrix matrix-bot-draupnir[2232724]: Sat, 25 Oct 2025 18:07:24 GMT [ERROR] [ActionException] ActionException Unknown cf5bf1b8-1326-4767-89ba-f1d522dbdceb Unable to query whether the user @abuse:fachschaften.org is a Synapse Admin Error: Error during MatrixClient request GET /_synapse/admin/v1/users/%40abuse%3Afachschaften.org/admin: 404 Not Found -- {"errcode":"M_UNRECOGNIZED","error":"Unrecognized request"}
Oct 25 20:07:24 matrix matrix-bot-draupnir[2232724]: at /draupnir/utils.js:255:23
Oct 25 20:07:24 matrix matrix-bot-draupnir[2232724]: at result (/draupnir/utils.js:371:21)
Oct 25 20:07:24 matrix matrix-bot-draupnir[2232724]: at new Promise (<anonymous>)
Oct 25 20:07:24 matrix matrix-bot-draupnir[2232724]: at /draupnir/utils.js:370:38
Oct 25 20:07:24 matrix matrix-bot-draupnir[2232724]: at respIsBuffer (/node_modules/matrix-bot-sdk/lib/http.js:72:38)
Oct 25 20:07:24 matrix matrix-bot-draupnir[2232724]: at new Promise (<anonymous>)
Oct 25 20:07:24 matrix matrix-bot-draupnir[2232724]: at doHttpRequest (/node_modules/matrix-bot-sdk/lib/http.js:71:41)
Oct 25 20:07:24 matrix matrix-bot-draupnir[2232724]: at MatrixClient.doRequest (/node_modules/matrix-bot-sdk/lib/MatrixClient.js:1902:41)
Oct 25 20:07:24 matrix matrix-bot-draupnir[2232724]: at descriptor.value (/node_modules/matrix-bot-sdk/lib/metrics/decorators.js:19:53)
Oct 25 20:07:24 matrix matrix-bot-draupnir[2232724]: at SynapseAdminClient.isSynapseAdmin (/node_modules/matrix-protection-suite-for-matrix-bot-sdk/dist/SynapseAdmin/SynapseAdminClient.js:63:44)
As far as I can tell, this is because Draupnir uses the GET /_synapse/admin/v1/users/<user_id>/admin API route, which is unavailable when MSC3861 is in use.