CVE-2026-13143

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-07-30. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: Elevated riskExposed: 0

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

The WP Travel WordPress plugin before 11.8.1 does not verify PayPal Instant Payment Notifications through the PayPal post-back handshake before marking a booking paid, allowing unauthenticated attackers to forge a notification that flips an arbitrary pending booking to a paid and booked state at an attacker-chosen amount.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
55(Attend)
EG Risk 55/100SSVC: Attend

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
Severity53% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
13%
KEV
Not listed

Published

July 30, 2026

Last Modified

July 30, 2026

Advisory Details (1)

Auto-updated Jul 30, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

WP Travel < 11.8.1 – Unauthenticated Payment Bypass via Forged PayPal IPN | CVE 2026-13143 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/21bc82e3-4568-4e01-8704-88a242743402/

Vendor Advisories for CVE-2026-13143(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 17× in last 7d / 70× 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 140 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-13143?
CVE-2026-13143 is a medium vulnerability published on July 30, 2026. The WP Travel WordPress plugin before 11.8.1 does not verify PayPal Instant Payment Notifications through the PayPal post-back handshake before marking a booking paid, allowing unauthenticated attackers to forge a notification that flips an arbitrary pending booking to a paid and booked state at an…
When was CVE-2026-13143 disclosed?
CVE-2026-13143 was first published in the National Vulnerability Database on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-13143 actively exploited?
CVE-2026-13143 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 87.1% of all scored CVEs.
What is the CVSS score of CVE-2026-13143?
CVE-2026-13143 has a CVSS v3.1 base score of 5.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-13143?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-13143, 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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