CVE-2026-48783

MEDIUMPre-NVD 4.84.8—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 93% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
4.8
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Postiz is an AI social media scheduling tool. Versions prior to 2.21.8 contained an unauthenticated endpoint that accepted a signed token and applied subscription-enforcement side effects to the organization referenced in that token's claims, without verifying the token's intended purpose. The endpoint, /public/modify-subscription, could not change the persisted subscription tier, but it did execute enforcement-related side effects on the caller's own organization, including adjusting team-member enablement state, disabling integrations exceeding the asserted plan's limits, and resetting the scheduled-post cron when the asserted plan was the free tier. Impact is limited to the attacker's own organization and cannot be redirected at other tenants through this endpoint. This issue has been fixed in version 2.21.8.

CVSS v3
4.8
EG Score
4.8(medium)
EPSS
6.7%
KEV
Not listed

Published

June 17, 2026

Last Modified

June 17, 2026

Advisory Details (4)

Auto-updated Jun 18, 2026
Patch available. Sources: github_commit, github_release, github.
github Patch Available

Unauthenticated billing-enforcement bypass via /public/modify-subscription · Advisory · gitroomhq/postiz-app · GitHub

https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-v4wr-4j8g-4hfj
github_release Patch Available

v2.21.8

Patch available: gitroomhq/postiz-app v2.21.8

https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.8
github_commit Patch Available

commit 23696d297351 (gitroomhq/postiz-app)

Patch available: gitroomhq/postiz-app v2.21.8 (contains commit 23696d297351)

https://github.com/gitroomhq/postiz-app/commit/23696d2973510ae1f3f48bfa41a6bfbbf9827b05
generic

PSA-2026-WWFR8X: Unauthenticated billing-enforcement bypass via /public/modify-subscription — GAdvisory

https://gadvisory.org/advisories/PSA-2026-WWFR8X

Weakness Classification(4)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 14× in last 7d / 59× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-11 20:59 UTCEG score recompute
  2. 2026-07-11 08:27 UTCEPSS rescore
  3. 2026-07-10 22:45 UTCEG score recompute
  4. 2026-07-10 00:10 UTCEG score recompute
  5. 2026-07-09 19:10 UTCEPSS rescore
  6. 2026-07-09 01:55 UTCEG score recompute
  7. 2026-07-08 15:16 UTCEPSS rescore
  8. 2026-07-08 03:16 UTCEG score recompute
  9. 2026-07-07 13:46 UTCEPSS rescore
  10. 2026-07-07 04:47 UTCEG score recompute
  11. 2026-07-06 16:27 UTCEPSS rescore
  12. 2026-07-06 06:32 UTCEG score recompute
  13. 2026-07-06 02:23 UTCEPSS rescore
  14. 2026-07-05 07:44 UTCEG score recompute
  15. 2026-07-05 02:30 UTCEPSS rescore
  16. 2026-07-04 09:28 UTCEG score recompute
  17. 2026-07-04 06:31 UTCEPSS rescore
  18. 2026-07-03 11:13 UTCEG score recompute
  19. 2026-07-02 12:39 UTCEG score recompute
  20. 2026-07-01 15:07 UTCEPSS rescore
  21. 2026-07-01 14:19 UTCEG score recompute
  22. 2026-06-30 23:22 UTCEPSS rescore
  23. 2026-06-30 16:05 UTCEG score recompute
  24. 2026-06-29 17:46 UTCEG score recompute
  25. 2026-06-29 14:06 UTCEPSS rescore
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  1. 2026-06-29 14:06 UTCEPSS rescore
  2. 2026-06-28 19:29 UTCEG score recompute
  3. 2026-06-28 14:07 UTCEPSS rescore
  4. 2026-06-28 04:56 UTCEPSS rescore
  5. 2026-06-28 04:56 UTCEPSS rescore
  6. 2026-06-27 21:15 UTCEG score recompute
  7. 2026-06-27 03:08 UTCEPSS rescore
  8. 2026-06-26 23:01 UTCEG score recompute
  9. 2026-06-26 00:47 UTCEG score recompute
  10. 2026-06-25 13:49 UTCEPSS rescore
  11. 2026-06-25 02:31 UTCEG score recompute
  12. 2026-06-24 14:05 UTCEPSS rescore
  13. 2026-06-24 04:16 UTCEG score recompute
  14. 2026-06-23 21:33 UTCEPSS rescore
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  16. 2026-06-23 05:42 UTCEG score recompute
  17. 2026-06-22 14:25 UTCEPSS rescore
  18. 2026-06-22 14:25 UTCEPSS rescore
  19. 2026-06-22 07:22 UTCEG score recompute
  20. 2026-06-21 14:56 UTCEPSS rescore
  21. 2026-06-21 14:56 UTCEPSS rescore
  22. 2026-06-21 09:06 UTCEG score recompute
  23. 2026-06-21 01:59 UTCEPSS rescore
  24. 2026-06-21 01:59 UTCEPSS rescore
  25. 2026-06-20 10:53 UTCEG score recompute
  26. 2026-06-19 19:26 UTCEPSS rescore
  27. 2026-06-19 19:26 UTCEPSS rescore
  28. 2026-06-19 12:39 UTCEG score recompute
  29. 2026-06-18 17:52 UTCEPSS rescore
  30. 2026-06-18 17:52 UTCEPSS rescore
  31. 2026-06-18 14:20 UTCEG score recompute
  32. 2026-06-17 17:53 UTCEPSS rescore
  33. 2026-06-17 16:05 UTCEG score recompute
  34. 2026-06-17 15:52 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-48783?
CVE-2026-48783 is a medium vulnerability published on June 17, 2026. Postiz is an AI social media scheduling tool. Versions prior to 2.21.8 contained an unauthenticated endpoint that accepted a signed token and applied subscription-enforcement side effects to the organization referenced in that token's claims, without verifying the token's intended purpose. The…
When was CVE-2026-48783 disclosed?
CVE-2026-48783 was first published in the National Vulnerability Database on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48783 actively exploited?
CVE-2026-48783 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 6.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-48783?
CVE-2026-48783 has a CVSS v3 base score of 4.8 (NVD).
How do I remediate CVE-2026-48783?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48783, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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