CVE-2026-89030

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory published 2026-09-16. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0

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

Adenion Blog2Social plugin for WordPress before 9.1.0 exposes the email addresses of all registered WordPress users to low-privileged accounts. The b2s_search_user AJAX handler in includes/Ajax/Get.php invokes B2S_Tools::searchUser() in includes/Tools.php, which returns the email address of every matching user without restricting access to callers holding the list_users capability, allowing any user with the edit_posts capability to retrieve user email addresses including those of administrators.

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
19(Track)
EG Risk 19/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
18%
KEV
Not listed

Published

September 16, 2026

Last Modified

September 24, 2026

Advisory Details (2)

Auto-updated Sep 16, 2026
No patch confirmed yet.
generic

Blog2Social WordPress Plugin < 9.1.0 User Email Disclosure via b2s_search_user | Advisories | VulnCheck

https://www.vulncheck.com/advisories/blog2social-wordpress-plugin-user-email-disclosure-via-b2s-search-user
generic

Blog2Social: Social Media Auto Post & Scheduler – WordPress plugin | WordPress.org

https://wordpress.org/plugins/blog2social/#developers

Vendor Advisories for CVE-2026-89030(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 29× 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. 2026-09-24 20:55 UTCEG score recompute
  2. 2026-09-24 20:55 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-24 03:52 UTCEG score recompute
  5. 2026-09-24 03:52 UTCGHSA enrichment
  6. 2026-09-23 17:54 UTCEPSS rescore
  7. 2026-09-23 02:09 UTCEG score recompute
  8. 2026-09-23 02:09 UTCGHSA enrichment
  9. 2026-09-22 16:01 UTCEPSS rescore
  10. 2026-09-22 00:36 UTCEG score recompute
  11. 2026-09-22 00:36 UTCGHSA enrichment
  12. 2026-09-21 21:09 UTCEPSS rescore
  13. 2026-09-20 23:03 UTCEG score recompute
  14. 2026-09-20 23:03 UTCGHSA enrichment
  15. 2026-09-20 20:16 UTCEPSS rescore
  16. 2026-09-19 21:25 UTCEG score recompute
  17. 2026-09-19 21:25 UTCGHSA enrichment
  18. 2026-09-18 19:52 UTCEG score recompute
  19. 2026-09-18 19:52 UTCGHSA enrichment
  20. 2026-09-18 19:28 UTCEPSS rescore
  21. 2026-09-17 19:32 UTCEPSS rescore
  22. 2026-09-17 18:19 UTCGHSA enrichment
  23. 2026-09-16 16:34 UTCEG score recompute
  24. 2026-09-16 16:34 UTCGHSA enrichment
  25. 2026-09-16 15:36 UTCEG score recompute
Show 4 more
  1. 2026-09-16 15:36 UTCGHSA enrichment
  2. 2026-09-16 14:23 UTCEG score recompute
  3. 2026-09-16 14:06 UTCEG score recompute
  4. 2026-09-16 14:05 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-89030?
CVE-2026-89030 is a medium vulnerability published on September 16, 2026. Adenion Blog2Social plugin for WordPress before 9.1.0 exposes the email addresses of all registered WordPress users to low-privileged accounts. The b2ssearchuser AJAX handler in includes/Ajax/Get.php invokes B2STools::searchUser() in includes/Tools.php, which returns the email address of every…
When was CVE-2026-89030 disclosed?
CVE-2026-89030 was first published in the National Vulnerability Database on September 16, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-89030 actively exploited?
CVE-2026-89030 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 81.7% of all scored CVEs.
What is the CVSS score of CVE-2026-89030?
CVE-2026-89030 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-89030?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-89030, 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.

Dependency Blast Radius

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