Insufficient verification of lifetime-deal redemption codes allows forgery of permanent paid subscriptions

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-19127
StatePUBLISHED
Assignerpostiz
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-06 22:16:55 UTC
Updated2026-08-07 14:16:57 UTC
DescriptionAn 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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from 4cdc9741-f887-419a-a2fd-acbbd2729276

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

EPSS: 0.002860000 probability, percentile 0.208430000 (date 2026-08-10)

Problem Types: CWE-345 | CWE-345 CWE-345

VersionSourceTypeScoreSeverityVector
3.14cdc9741-f887-419a-a2fd-acbbd2729276Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
3.1CNACVSS6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA GitroomHQ Postiz-app affected 2.21.10 semver Not specified

References

ReferenceSourceLinkTags
github.com/gitroomhq/postiz-app/commit/387d85dabe0223cd930714c19072a0aee... 4cdc9741-f887-419a-a2fd-acbbd2729276 github.com
gadvisory.org/advisories/PSA-2026-NWZN9J 4cdc9741-f887-419a-a2fd-acbbd2729276 gadvisory.org
github.com/gitroomhq/postiz-app/releases/tag/v2.21.10 4cdc9741-f887-419a-a2fd-acbbd2729276 github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Enno Gelhaus (en)

CNA: Enno Gelhaus (en)

CNA: Nevo David (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-06-21T18:00:00.000ZPostiz has discovered the vulnerability.
CNA2026-06-22T13:20:00.000ZPostiz has developed and verified the fix.
CNA2026-06-22T13:44:00.000ZPostiz has created the release and published the advisory.
CNA2026-08-06T16:04:00.000ZPostiz has assigned CVE-2026-19127 for this advisory.

Solutions

CNA: No solution other than upgrading to v2.21.10 is currently known.

Workarounds

CNA: No workaround other than upgrading to v2.21.10 is currently known.

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