CVE-2026-16537

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreHIGH confidence

Score 5.4 from GitHub Security Advisory published 2026-08-06. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.4Exploit: Elevated riskExposed: 0

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

The Slick Slider WordPress plugin before 0.5.3 does not sanitize and escape a shortcode attribute value before outputting it in an HTML attribute, allowing users with the Contributor role and above to perform Stored Cross-Site Scripting attacks that execute when a user views the affected post.

CVSS v3
5.4
EG Score
5.4(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity54% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 6, 2026

Last Modified

August 6, 2026

Advisory Details (1)

Auto-updated Aug 6, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Slick Slider < 0.5.3 – Contributor+ Stored XSS via Gallery Shortcode | CVE 2026-16537 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/8de9a050-45b5-4e51-9cd9-06f85999393a/

Vendor Advisories for CVE-2026-16537(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 19× in last 7d / 48× 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. 2026-08-20 22:55 UTCEPSS rescore
  2. 2026-08-20 12:18 UTCEG score recompute
  3. 2026-08-20 12:18 UTCGHSA enrichment
  4. 2026-08-19 17:03 UTCEPSS rescore
  5. 2026-08-19 14:03 UTCGHSA enrichment
  6. 2026-08-18 15:43 UTCEG score recompute
  7. 2026-08-18 15:43 UTCGHSA enrichment
  8. 2026-08-18 13:48 UTCEPSS rescore
  9. 2026-08-17 16:38 UTCEG score recompute
  10. 2026-08-17 16:38 UTCGHSA enrichment
  11. 2026-08-17 13:47 UTCEPSS rescore
  12. 2026-08-16 18:23 UTCEG score recompute
  13. 2026-08-16 18:23 UTCGHSA enrichment
  14. 2026-08-16 14:56 UTCEPSS rescore
  15. 2026-08-16 02:14 UTCEPSS rescore
  16. 2026-08-15 20:07 UTCEG score recompute
  17. 2026-08-15 20:07 UTCGHSA enrichment
  18. 2026-08-15 01:30 UTCEPSS rescore
  19. 2026-08-14 21:52 UTCGHSA enrichment
  20. 2026-08-13 23:37 UTCEG score recompute
  21. 2026-08-13 23:37 UTCGHSA enrichment
  22. 2026-08-13 22:00 UTCEPSS rescore
  23. 2026-08-13 01:22 UTCEG score recompute
  24. 2026-08-13 01:22 UTCGHSA enrichment
  25. 2026-08-12 13:50 UTCEPSS rescore
Show 23 more
  1. 2026-08-12 03:07 UTCGHSA enrichment
  2. 2026-08-11 04:51 UTCEG score recompute
  3. 2026-08-11 04:51 UTCGHSA enrichment
  4. 2026-08-11 00:00 UTCEPSS rescore
  5. 2026-08-10 06:36 UTCEG score recompute
  6. 2026-08-10 06:36 UTCGHSA enrichment
  7. 2026-08-09 13:46 UTCEPSS rescore
  8. 2026-08-09 08:21 UTCEG score recompute
  9. 2026-08-09 08:21 UTCGHSA enrichment
  10. 2026-08-08 16:37 UTCEPSS rescore
  11. 2026-08-08 10:06 UTCEG score recompute
  12. 2026-08-08 10:06 UTCGHSA enrichment
  13. 2026-08-07 11:51 UTCEG score recompute
  14. 2026-08-07 11:51 UTCGHSA enrichment
  15. 2026-08-06 13:46 UTCEPSS rescore
  16. 2026-08-06 13:36 UTCEG score recompute
  17. 2026-08-06 13:36 UTCGHSA enrichment
  18. 2026-08-06 13:09 UTCEG score recompute▲ 5.40
  19. 2026-08-06 13:09 UTCGHSA enrichment
  20. 2026-08-06 13:08 UTCMITRE cvelistV5CVSS v3 → 5.4 · severity → MEDIUM
  21. 2026-08-06 07:17 UTCNVD update
  22. 2026-08-06 06:25 UTCEG score recompute
  23. 2026-08-06 06:25 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-16537?
CVE-2026-16537 is a medium vulnerability published on August 6, 2026. The Slick Slider WordPress plugin before 0.5.3 does not sanitize and escape a shortcode attribute value before outputting it in an HTML attribute, allowing users with the Contributor role and above to perform Stored Cross-Site Scripting attacks that execute when a user views the affected post.
When was CVE-2026-16537 disclosed?
CVE-2026-16537 was first published in the National Vulnerability Database on August 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16537 actively exploited?
CVE-2026-16537 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 96.7% of all scored CVEs.
What is the CVSS score of CVE-2026-16537?
CVE-2026-16537 has a CVSS v3.1 base score of 5.4 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-16537?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16537, 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

Explore the affected products and dependency analysis for CVE-2026-16537

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