CVE-2021-47843 Tagstoo 2.0.1 - Stored XSS to RCE
Attackers can inject malicious scripts via files or tags to execute arbitrary code on the victim's computer.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-47843?
CVE-2021-47843 is a medium-severity cross-site scripting vulnerability in Tagstoo, published on 15 Jan 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Tagstoo 2.0.1 contains a stored cross-site scripting vulnerability that allows attackers to inject malicious payloads through files or custom tags. Attackers can execute arbitrary JavaScript code to spawn system processes, access files, and perform remote code execution on the victim's computer.
Weakness: CWE-79
Which versions are affected by CVE-2021-47843?
It affects 1 product.
Products include Pabloandumundu Tagstoo.
How do I fix CVE-2021-47843?
No fix has been published for CVE-2021-47843 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2021-47843 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47843 exists.
Sources
Also known as GHSA-m46h-g9fm-378f.