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
12%
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 15× in last 7d / 81× 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. 2026-08-30 01:21 UTCEPSS rescore
  2. 2026-08-29 22:40 UTCEG score recompute
  3. 2026-08-29 22:40 UTCGHSA enrichment
  4. 2026-08-28 21:40 UTCEPSS rescore
  5. 2026-08-27 14:24 UTCEPSS rescore
  6. 2026-08-27 08:58 UTCEG score recompute
  7. 2026-08-27 08:58 UTCGHSA enrichment
  8. 2026-08-26 06:46 UTCEG score recompute
  9. 2026-08-26 06:46 UTCGHSA enrichment
  10. 2026-08-25 13:48 UTCEPSS rescore
  11. 2026-08-25 06:48 UTCEG score recompute
  12. 2026-08-25 06:48 UTCGHSA enrichment
  13. 2026-08-24 07:10 UTCGHSA enrichment
  14. 2026-08-23 07:32 UTCEG score recompute
  15. 2026-08-23 07:32 UTCGHSA enrichment
  16. 2026-08-23 00:19 UTCEPSS rescore
  17. 2026-08-22 07:56 UTCEG score recompute
  18. 2026-08-22 07:56 UTCGHSA enrichment
  19. 2026-08-21 23:48 UTCEPSS rescore
  20. 2026-08-21 08:19 UTCEG score recompute
  21. 2026-08-21 08:19 UTCGHSA enrichment
  22. 2026-08-20 22:55 UTCEPSS rescore
  23. 2026-08-20 08:43 UTCEG score recompute
  24. 2026-08-20 08:43 UTCGHSA enrichment
  25. 2026-08-19 17:03 UTCEPSS rescore
Show 67 more
  1. 2026-08-19 09:07 UTCEG score recompute
  2. 2026-08-19 09:06 UTCGHSA enrichment
  3. 2026-08-18 13:48 UTCEPSS rescore
  4. 2026-08-18 09:29 UTCEG score recompute
  5. 2026-08-18 09:29 UTCGHSA enrichment
  6. 2026-08-17 09:53 UTCEG score recompute
  7. 2026-08-17 09:53 UTCGHSA enrichment
  8. 2026-08-16 14:56 UTCEPSS rescore
  9. 2026-08-16 10:17 UTCEG score recompute
  10. 2026-08-16 10:17 UTCGHSA enrichment
  11. 2026-08-16 02:14 UTCEPSS rescore
  12. 2026-08-15 10:41 UTCEG score recompute
  13. 2026-08-15 10:41 UTCGHSA enrichment
  14. 2026-08-15 01:30 UTCEPSS rescore
  15. 2026-08-14 11:04 UTCEG score recompute
  16. 2026-08-14 11:04 UTCGHSA enrichment
  17. 2026-08-13 22:00 UTCEPSS rescore
  18. 2026-08-13 11:27 UTCEG score recompute
  19. 2026-08-13 11:27 UTCGHSA enrichment
  20. 2026-08-12 13:50 UTCEPSS rescore
  21. 2026-08-12 11:51 UTCEG score recompute
  22. 2026-08-12 11:51 UTCGHSA enrichment
  23. 2026-08-11 13:42 UTCEPSS rescore
  24. 2026-08-11 12:14 UTCEG score recompute
  25. 2026-08-11 12:14 UTCGHSA enrichment
  26. 2026-08-10 23:59 UTCEPSS rescore
  27. 2026-08-10 12:37 UTCEG score recompute
  28. 2026-08-10 12:37 UTCGHSA enrichment
  29. 2026-08-09 13:46 UTCEPSS rescore
  30. 2026-08-09 13:01 UTCEG score recompute
  31. 2026-08-09 13:01 UTCGHSA enrichment
  32. 2026-08-08 16:37 UTCEPSS rescore
  33. 2026-08-08 13:25 UTCEG score recompute
  34. 2026-08-08 13:25 UTCGHSA enrichment
  35. 2026-08-07 13:48 UTCGHSA enrichment
  36. 2026-08-06 14:12 UTCEG score recompute
  37. 2026-08-06 14:12 UTCGHSA enrichment
  38. 2026-08-06 13:46 UTCEPSS rescore
  39. 2026-08-05 19:17 UTCEPSS rescore
  40. 2026-08-05 14:35 UTCEG score recompute
  41. 2026-08-05 14:35 UTCGHSA enrichment
  42. 2026-08-04 15:09 UTCEPSS rescore
  43. 2026-08-04 14:59 UTCEG score recompute
  44. 2026-08-04 14:59 UTCGHSA enrichment
  45. 2026-08-04 10:38 UTCEPSS rescore
  46. 2026-08-03 15:23 UTCEG score recompute
  47. 2026-08-03 15:23 UTCGHSA enrichment
  48. 2026-08-03 10:35 UTCEPSS rescore
  49. 2026-08-02 15:47 UTCEG score recompute
  50. 2026-08-02 15:47 UTCGHSA enrichment
  51. 2026-08-02 02:26 UTCEPSS rescore
  52. 2026-08-01 16:10 UTCEG score recompute
  53. 2026-08-01 16:10 UTCGHSA enrichment
  54. 2026-08-01 04:15 UTCEPSS rescore
  55. 2026-07-31 16:33 UTCEG score recompute
  56. 2026-07-31 16:33 UTCGHSA enrichment
  57. 2026-07-30 16:55 UTCGHSA enrichment
  58. 2026-07-30 16:29 UTCEG score recompute
  59. 2026-07-30 16:29 UTCGHSA enrichment
  60. 2026-07-30 16:27 UTCEPSS rescore
  61. 2026-07-30 16:11 UTCEG score recompute▲ 5.30
  62. 2026-07-30 16:11 UTCGHSA enrichment
  63. 2026-07-30 16:11 UTCMITRE cvelistV5CVSS v3 → 5.3 · severity → MEDIUM
  64. 2026-07-30 06:37 UTCGHSA enrichment
  65. 2026-07-30 06:33 UTCNVD update
  66. 2026-07-30 06:19 UTCEG score recompute
  67. 2026-07-30 06:18 UTCMITRE cvelistV5first tracked

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 87.5% 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

Explore the affected products and dependency analysis for CVE-2026-13143

Explore →

Is Your Infrastructure Affected by CVE-2026-13143?

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

Start Free Scan →Browse All CVEs