CVE-2026-2021

MEDIUMPre-NVD 6.46.4—
EchelonGraph scoreHIGH confidence

Score 6.4 from GitHub Security Advisory published 2026-06-18. a secondary CVSS source baseline 6.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.4Exploit: NoneExposed: 0

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

The Slideshow Gallery LITE plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'alwaysauto' shortcode attribute in all versions up to, and including, 1.8.5. This is due to insufficient input sanitization and output escaping on user-supplied attributes. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

CVSS v3
6.4
EG Score
6.4(high)
EPSS
10.6%
KEV
Not listed

Published

June 18, 2026

Last Modified

June 18, 2026

References (6)

Vendor Advisories for CVE-2026-2021(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 22× in last 7d / 68× 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. 2026-07-07 06:04 UTCEG score recompute
  2. 2026-07-07 06:04 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 05:14 UTCEG score recompute
  6. 2026-07-06 05:14 UTCGHSA enrichment
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-05 04:20 UTCEG score recompute
  10. 2026-07-05 04:19 UTCGHSA enrichment
  11. 2026-07-05 02:30 UTCEPSS rescore
  12. 2026-07-04 06:31 UTCEPSS rescore
  13. 2026-07-04 03:23 UTCEG score recompute
  14. 2026-07-04 03:23 UTCGHSA enrichment
  15. 2026-07-03 01:55 UTCEG score recompute
  16. 2026-07-03 01:55 UTCGHSA enrichment
  17. 2026-07-02 01:06 UTCEG score recompute
  18. 2026-07-02 01:06 UTCGHSA enrichment
  19. 2026-07-01 15:06 UTCEPSS rescore
  20. 2026-07-01 00:18 UTCEG score recompute
  21. 2026-07-01 00:17 UTCGHSA enrichment
  22. 2026-06-30 23:22 UTCEPSS rescore
  23. 2026-06-29 23:28 UTCEG score recompute
  24. 2026-06-29 23:28 UTCGHSA enrichment
  25. 2026-06-29 14:06 UTCEPSS rescore
Show 43 more
  1. 2026-06-29 14:06 UTCEPSS rescore
  2. 2026-06-28 22:40 UTCEG score recompute
  3. 2026-06-28 22:40 UTCGHSA enrichment
  4. 2026-06-28 14:07 UTCEPSS rescore
  5. 2026-06-28 14:07 UTCEPSS rescore
  6. 2026-06-28 04:56 UTCEPSS rescore
  7. 2026-06-28 04:56 UTCEPSS rescore
  8. 2026-06-27 21:52 UTCEG score recompute
  9. 2026-06-27 21:52 UTCGHSA enrichment
  10. 2026-06-27 03:08 UTCEPSS rescore
  11. 2026-06-26 21:04 UTCEG score recompute
  12. 2026-06-26 21:04 UTCGHSA enrichment
  13. 2026-06-25 20:16 UTCEG score recompute
  14. 2026-06-25 20:16 UTCGHSA enrichment
  15. 2026-06-25 13:49 UTCEPSS rescore
  16. 2026-06-25 13:49 UTCEPSS rescore
  17. 2026-06-24 19:26 UTCEG score recompute
  18. 2026-06-24 19:26 UTCGHSA enrichment
  19. 2026-06-24 14:05 UTCEPSS rescore
  20. 2026-06-24 14:05 UTCEPSS rescore
  21. 2026-06-23 21:33 UTCEPSS rescore
  22. 2026-06-23 21:32 UTCEPSS rescore
  23. 2026-06-23 17:59 UTCEG score recompute
  24. 2026-06-23 17:59 UTCGHSA enrichment
  25. 2026-06-22 17:11 UTCEG score recompute
  26. 2026-06-22 17:11 UTCGHSA enrichment
  27. 2026-06-22 14:25 UTCEPSS rescore
  28. 2026-06-22 14:25 UTCEPSS rescore
  29. 2026-06-21 16:21 UTCEG score recompute
  30. 2026-06-21 16:20 UTCGHSA enrichment
  31. 2026-06-21 14:56 UTCEPSS rescore
  32. 2026-06-21 14:56 UTCEPSS rescore
  33. 2026-06-21 01:59 UTCEPSS rescore
  34. 2026-06-21 01:59 UTCEPSS rescore
  35. 2026-06-20 15:32 UTCEG score recompute
  36. 2026-06-20 15:32 UTCGHSA enrichment
  37. 2026-06-19 19:25 UTCEPSS rescore
  38. 2026-06-19 19:25 UTCEPSS rescore
  39. 2026-06-19 14:41 UTCEG score recompute
  40. 2026-06-19 14:40 UTCGHSA enrichment
  41. 2026-06-18 17:52 UTCEPSS rescore
  42. 2026-06-18 13:53 UTCEG score recompute
  43. 2026-06-18 13:52 UTCNVD updatefirst tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-2021?
CVE-2026-2021 is a medium vulnerability published on June 18, 2026. The Slideshow Gallery LITE plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'alwaysauto' shortcode attribute in all versions up to, and including, 1.8.5. This is due to insufficient input sanitization and output escaping on user-supplied attributes. This makes it possible…
When was CVE-2026-2021 disclosed?
CVE-2026-2021 was first published in the National Vulnerability Database on June 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-2021 actively exploited?
CVE-2026-2021 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 10.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-2021?
CVE-2026-2021 has a CVSS v3 base score of 6.4 (NVD).
How do I remediate CVE-2026-2021?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-2021, 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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