CVE-2026-13203

MEDIUMPre-NVD 6.46.4—
EchelonGraph scoreMEDIUM confidence

Score 6.4 from GitHub Security Advisory published 2026-09-01. 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: 0.2%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 Live Composer – Free WordPress Website Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'custom_id' shortcode attribute of the dslc_modules_section and dslc_modules_area shortcodes in versions up to, and including, 2.1.19. This is due to insufficient input sanitization and output escaping on the user-supplied attribute, which is concatenated into the HTML id="" attribute of the rendered element in the dslc_modules_section_front() and dslc_modules_area_front() functions without esc_attr(). 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
0.2%
EPSS %ILE
13th
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

September 1, 2026

Last Modified

September 1, 2026

References (12)

Vendor Advisories for CVE-2026-13203(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 18× in last 7d / 74× 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. 2026-10-04 23:21 UTCEPSS rescore
  2. 2026-10-04 13:38 UTCEG score recompute
  3. 2026-10-04 13:38 UTCGHSA enrichment
  4. 2026-10-03 14:25 UTCEPSS rescore
  5. 2026-10-03 13:18 UTCEG score recompute
  6. 2026-10-03 13:18 UTCGHSA enrichment
  7. 2026-10-02 09:16 UTCEG score recompute
  8. 2026-10-02 09:16 UTCGHSA enrichment
  9. 2026-10-01 19:49 UTCEPSS rescore
  10. 2026-10-01 08:57 UTCEG score recompute
  11. 2026-10-01 08:57 UTCGHSA enrichment
  12. 2026-09-30 15:02 UTCEPSS rescore
  13. 2026-09-30 08:37 UTCEG score recompute
  14. 2026-09-30 08:37 UTCGHSA enrichment
  15. 2026-09-29 15:20 UTCEPSS rescore
  16. 2026-09-29 08:16 UTCEG score recompute
  17. 2026-09-29 08:16 UTCGHSA enrichment
  18. 2026-09-28 13:50 UTCEPSS rescore
  19. 2026-09-28 07:54 UTCEG score recompute
  20. 2026-09-28 07:54 UTCGHSA enrichment
  21. 2026-09-27 07:34 UTCEG score recompute
  22. 2026-09-27 07:34 UTCGHSA enrichment
  23. 2026-09-26 15:58 UTCEPSS rescore
  24. 2026-09-26 07:05 UTCEG score recompute
  25. 2026-09-26 07:05 UTCGHSA enrichment
Show 66 more
  1. 2026-09-25 06:30 UTCEG score recompute
  2. 2026-09-25 06:29 UTCGHSA enrichment
  3. 2026-09-24 06:09 UTCEG score recompute
  4. 2026-09-24 06:09 UTCGHSA enrichment
  5. 2026-09-23 13:47 UTCEPSS rescore
  6. 2026-09-23 05:49 UTCEG score recompute
  7. 2026-09-23 05:49 UTCGHSA enrichment
  8. 2026-09-22 05:29 UTCEG score recompute
  9. 2026-09-22 05:29 UTCGHSA enrichment
  10. 2026-09-21 05:08 UTCEG score recompute
  11. 2026-09-21 05:08 UTCGHSA enrichment
  12. 2026-09-20 20:15 UTCEPSS rescore
  13. 2026-09-20 04:31 UTCEG score recompute
  14. 2026-09-20 04:31 UTCGHSA enrichment
  15. 2026-09-19 04:11 UTCEG score recompute
  16. 2026-09-19 04:11 UTCGHSA enrichment
  17. 2026-09-18 19:27 UTCEPSS rescore
  18. 2026-09-18 03:52 UTCEG score recompute
  19. 2026-09-18 03:52 UTCGHSA enrichment
  20. 2026-09-17 03:32 UTCEG score recompute
  21. 2026-09-17 03:32 UTCGHSA enrichment
  22. 2026-09-16 05:14 UTCEPSS rescore
  23. 2026-09-16 03:12 UTCEG score recompute
  24. 2026-09-16 03:12 UTCGHSA enrichment
  25. 2026-09-15 02:51 UTCGHSA enrichment
  26. 2026-09-14 02:31 UTCEG score recompute
  27. 2026-09-14 02:31 UTCGHSA enrichment
  28. 2026-09-13 16:46 UTCEPSS rescore
  29. 2026-09-13 02:11 UTCEG score recompute
  30. 2026-09-13 02:11 UTCGHSA enrichment
  31. 2026-09-12 15:00 UTCEPSS rescore
  32. 2026-09-12 01:51 UTCEG score recompute
  33. 2026-09-12 01:51 UTCGHSA enrichment
  34. 2026-09-11 14:52 UTCEPSS rescore
  35. 2026-09-11 01:31 UTCEG score recompute
  36. 2026-09-11 01:31 UTCGHSA enrichment
  37. 2026-09-10 09:34 UTCEPSS rescore
  38. 2026-09-10 01:11 UTCGHSA enrichment
  39. 2026-09-09 00:49 UTCEG score recompute
  40. 2026-09-09 00:49 UTCGHSA enrichment
  41. 2026-09-08 22:00 UTCEPSS rescore
  42. 2026-09-08 00:30 UTCEG score recompute
  43. 2026-09-08 00:30 UTCGHSA enrichment
  44. 2026-09-07 16:01 UTCEPSS rescore
  45. 2026-09-07 00:09 UTCEG score recompute
  46. 2026-09-07 00:09 UTCGHSA enrichment
  47. 2026-09-06 13:47 UTCEPSS rescore
  48. 2026-09-05 23:47 UTCEG score recompute
  49. 2026-09-05 23:47 UTCGHSA enrichment
  50. 2026-09-04 23:28 UTCEG score recompute
  51. 2026-09-04 23:28 UTCGHSA enrichment
  52. 2026-09-04 05:06 UTCEPSS rescore
  53. 2026-09-03 22:07 UTCGHSA enrichment
  54. 2026-09-02 21:20 UTCEG score recompute
  55. 2026-09-02 21:20 UTCGHSA enrichment
  56. 2026-09-02 14:11 UTCEPSS rescore
  57. 2026-09-01 20:59 UTCEG score recompute
  58. 2026-09-01 20:59 UTCGHSA enrichment
  59. 2026-09-01 13:53 UTCEPSS rescore
  60. 2026-09-01 13:42 UTCEG score recompute
  61. 2026-09-01 13:42 UTCGHSA enrichment
  62. 2026-09-01 12:50 UTCEG score recompute
  63. 2026-09-01 12:49 UTCGHSA enrichment
  64. 2026-09-01 05:41 UTCEG score recompute
  65. 2026-09-01 04:39 UTCEG score recompute
  66. 2026-09-01 04:39 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-13203?
CVE-2026-13203 is a medium vulnerability published on September 1, 2026. The Live Composer – Free WordPress Website Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'customid' shortcode attribute of the dslcmodulessection and dslcmodulesarea shortcodes in versions up to, and including, 2.1.19. This is due to insufficient input…
When was CVE-2026-13203 disclosed?
CVE-2026-13203 was first published on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-13203 actively exploited?
CVE-2026-13203 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (13th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-13203?
CVE-2026-13203 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-2026-13203?
No fix for CVE-2026-13203 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-2026-13203 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-13203

Explore →

Is Your Infrastructure Affected by CVE-2026-13203?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs