CVE-2026-18988

MEDIUMPre-NVD 6.46.4—
EchelonGraph scoreMEDIUM 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: 0.3%CVSS: 6.4Exploit: None knownExposed services: Not assessed

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

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
6.4MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100CISA SSVC

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%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
26th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

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 14× in last 7d / 62× 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.

Showing the most recent 100 of 143 total refreshes for this CVE.

  1. 2026-10-05 08:11 UTCEG score recompute
  2. 2026-10-05 08:11 UTCGHSA enrichment
  3. 2026-10-04 23:21 UTCEPSS rescore
  4. 2026-10-04 05:41 UTCEG score recompute
  5. 2026-10-04 05:41 UTCGHSA enrichment
  6. 2026-10-02 09:29 UTCEG score recompute
  7. 2026-10-02 09:29 UTCGHSA enrichment
  8. 2026-10-01 19:49 UTCEPSS rescore
  9. 2026-09-30 22:53 UTCEG score recompute
  10. 2026-09-30 22:53 UTCGHSA enrichment
  11. 2026-09-30 15:02 UTCEPSS rescore
  12. 2026-09-29 15:20 UTCEPSS rescore
  13. 2026-09-29 05:41 UTCEG score recompute
  14. 2026-09-29 05:41 UTCGHSA enrichment
  15. 2026-09-28 13:51 UTCEPSS rescore
  16. 2026-09-27 17:06 UTCEG score recompute
  17. 2026-09-27 17:06 UTCGHSA enrichment
  18. 2026-09-27 13:47 UTCEPSS rescore
  19. 2026-09-26 15:58 UTCEPSS rescore
  20. 2026-09-25 07:53 UTCEG score recompute
  21. 2026-09-25 07:53 UTCGHSA enrichment
  22. 2026-09-24 05:31 UTCEG score recompute
  23. 2026-09-24 05:30 UTCGHSA enrichment
  24. 2026-09-23 02:58 UTCEG score recompute
  25. 2026-09-23 02:58 UTCGHSA enrichment
Show 75 more
  1. 2026-09-22 00:39 UTCEG score recompute
  2. 2026-09-22 00:39 UTCGHSA enrichment
  3. 2026-09-20 20:32 UTCEG score recompute
  4. 2026-09-20 20:32 UTCGHSA enrichment
  5. 2026-09-19 12:53 UTCEG score recompute
  6. 2026-09-19 12:53 UTCGHSA enrichment
  7. 2026-09-18 19:27 UTCEPSS rescore
  8. 2026-09-18 07:54 UTCEG score recompute
  9. 2026-09-18 07:54 UTCGHSA enrichment
  10. 2026-09-17 05:35 UTCEG score recompute
  11. 2026-09-17 05:35 UTCGHSA enrichment
  12. 2026-09-16 14:07 UTCEPSS rescore
  13. 2026-09-16 05:14 UTCEPSS rescore
  14. 2026-09-16 03:16 UTCEG score recompute
  15. 2026-09-16 03:16 UTCGHSA enrichment
  16. 2026-09-15 00:57 UTCGHSA enrichment
  17. 2026-09-13 19:13 UTCEG score recompute
  18. 2026-09-13 19:13 UTCGHSA enrichment
  19. 2026-09-13 16:46 UTCEPSS rescore
  20. 2026-09-12 16:40 UTCEG score recompute
  21. 2026-09-12 16:40 UTCGHSA enrichment
  22. 2026-09-12 15:00 UTCEPSS rescore
  23. 2026-09-11 14:52 UTCEPSS rescore
  24. 2026-09-11 14:21 UTCEG score recompute
  25. 2026-09-11 14:21 UTCGHSA enrichment
  26. 2026-09-11 09:36 UTCEPSS rescore
  27. 2026-09-10 09:34 UTCEPSS rescore
  28. 2026-09-10 08:21 UTCGHSA enrichment
  29. 2026-09-09 05:59 UTCEG score recompute
  30. 2026-09-09 05:59 UTCGHSA enrichment
  31. 2026-09-08 22:00 UTCEPSS rescore
  32. 2026-09-07 17:41 UTCEG score recompute
  33. 2026-09-07 17:41 UTCGHSA enrichment
  34. 2026-09-07 16:01 UTCEPSS rescore
  35. 2026-09-06 13:47 UTCEPSS rescore
  36. 2026-09-06 13:33 UTCEG score recompute
  37. 2026-09-06 13:33 UTCGHSA enrichment
  38. 2026-09-05 11:14 UTCEG score recompute
  39. 2026-09-05 11:14 UTCGHSA enrichment
  40. 2026-09-04 08:49 UTCEG score recompute
  41. 2026-09-04 08:49 UTCGHSA enrichment
  42. 2026-09-04 05:06 UTCEPSS rescore
  43. 2026-09-03 03:59 UTCEG score recompute
  44. 2026-09-03 03:59 UTCGHSA enrichment
  45. 2026-09-02 14:11 UTCEPSS rescore
  46. 2026-09-02 00:47 UTCEG score recompute
  47. 2026-09-02 00:47 UTCGHSA enrichment
  48. 2026-09-01 13:53 UTCEPSS rescore
  49. 2026-09-01 04:39 UTCEPSS rescore
  50. 2026-08-31 22:26 UTCEG score recompute
  51. 2026-08-31 22:26 UTCGHSA enrichment
  52. 2026-08-30 19:17 UTCEPSS rescore
  53. 2026-08-30 18:16 UTCEG score recompute
  54. 2026-08-30 18:16 UTCGHSA enrichment
  55. 2026-08-30 01:22 UTCEPSS rescore
  56. 2026-08-29 15:57 UTCEG score recompute
  57. 2026-08-29 15:57 UTCGHSA enrichment
  58. 2026-08-28 21:41 UTCEPSS rescore
  59. 2026-08-28 11:51 UTCEG score recompute
  60. 2026-08-28 11:51 UTCGHSA enrichment
  61. 2026-08-27 14:25 UTCEPSS rescore
  62. 2026-08-27 04:14 UTCEG score recompute
  63. 2026-08-27 04:14 UTCGHSA enrichment
  64. 2026-08-26 14:46 UTCEPSS rescore
  65. 2026-08-26 01:52 UTCEG score recompute
  66. 2026-08-26 01:52 UTCGHSA enrichment
  67. 2026-08-25 13:48 UTCEPSS rescore
  68. 2026-08-24 23:34 UTCEG score recompute
  69. 2026-08-24 23:34 UTCGHSA enrichment
  70. 2026-08-23 21:14 UTCEG score recompute
  71. 2026-08-23 21:14 UTCGHSA enrichment
  72. 2026-08-23 00:19 UTCEPSS rescore
  73. 2026-08-22 18:56 UTCEG score recompute
  74. 2026-08-22 18:56 UTCGHSA enrichment
  75. 2026-08-21 23:49 UTCEPSS rescore

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 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 0.3% probability of exploitation in the next 30 days (26th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-18988?
CVE-2026-18988 has a CVSS base score of 6.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-18988?
No fix for CVE-2026-18988 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-18988 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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