CVE-2026-18988

MEDIUMPre-NVD 6.46.4—
EchelonGraph scoreHIGH confidence

Score 6.4 from GitHub Security Advisory published 2026-08-08. 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
6.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.4Exploit: None knownExposed: 0

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

The Easy Accordion plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'accordionTitleTag' block attribute in versions up to, and including, 3.1.8. This is due to insufficient input sanitization and output escaping in the accordion_header_renderer() function, which emits the attacker-supplied tag name using esc_attr() in an HTML tag-name context instead of tag_escape(). 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)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity64% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
19%
KEV
Not listed

Published

August 8, 2026

Last Modified

August 12, 2026

References (6)

Vendor Advisories for CVE-2026-18988(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 / 41× 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 14:17 UTCEG score recompute
  3. 2026-08-20 14:17 UTCGHSA enrichment
  4. 2026-08-19 17:03 UTCEPSS rescore
  5. 2026-08-19 11:16 UTCEG score recompute
  6. 2026-08-19 11:16 UTCGHSA enrichment
  7. 2026-08-18 13:48 UTCEPSS rescore
  8. 2026-08-18 08:52 UTCEG score recompute
  9. 2026-08-18 08:52 UTCGHSA enrichment
  10. 2026-08-17 13:47 UTCEPSS rescore
  11. 2026-08-17 06:33 UTCEG score recompute
  12. 2026-08-17 06:33 UTCGHSA enrichment
  13. 2026-08-16 14:56 UTCEPSS rescore
  14. 2026-08-16 04:02 UTCEG score recompute
  15. 2026-08-16 04:02 UTCGHSA enrichment
  16. 2026-08-16 02:14 UTCEPSS rescore
  17. 2026-08-15 01:42 UTCEG score recompute
  18. 2026-08-15 01:42 UTCGHSA enrichment
  19. 2026-08-15 01:30 UTCEPSS rescore
  20. 2026-08-13 23:24 UTCEG score recompute
  21. 2026-08-13 23:24 UTCGHSA enrichment
  22. 2026-08-13 22:00 UTCEPSS rescore
  23. 2026-08-12 21:04 UTCGHSA enrichment
  24. 2026-08-12 15:24 UTCEG score recompute
  25. 2026-08-12 15:24 UTCGHSA enrichment
Show 16 more
  1. 2026-08-12 14:34 UTCEG score recompute
  2. 2026-08-12 14:34 UTCGHSA enrichment
  3. 2026-08-12 13:50 UTCEPSS rescore
  4. 2026-08-11 13:42 UTCEPSS rescore
  5. 2026-08-11 12:14 UTCEG score recompute
  6. 2026-08-11 12:14 UTCGHSA enrichment
  7. 2026-08-11 00:00 UTCEPSS rescore
  8. 2026-08-10 09:55 UTCEG score recompute
  9. 2026-08-10 09:55 UTCGHSA enrichment
  10. 2026-08-09 13:46 UTCEPSS rescore
  11. 2026-08-09 07:37 UTCEG score recompute
  12. 2026-08-09 07:37 UTCGHSA enrichment
  13. 2026-08-08 16:37 UTCEPSS rescore
  14. 2026-08-08 05:18 UTCEG score recompute
  15. 2026-08-08 04:42 UTCEG score recompute
  16. 2026-08-08 04:42 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-18988?
CVE-2026-18988 is a medium vulnerability published on August 8, 2026. The Easy Accordion plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'accordionTitleTag' block attribute in versions up to, and including, 3.1.8. This is due to insufficient input sanitization and output escaping in the accordionheaderrenderer() function, which emits the…
When was CVE-2026-18988 disclosed?
CVE-2026-18988 was first published in the National Vulnerability Database on August 8, 2026, with the most recent update on August 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18988 actively exploited?
CVE-2026-18988 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 81.3% of all scored CVEs.
What is the CVSS score of CVE-2026-18988?
CVE-2026-18988 has a CVSS v3 base score of 6.4 (NVD).
How do I remediate CVE-2026-18988?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18988, 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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