CVE-2026-63303

MEDIUMPre-NVD 5.15.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 67% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
5.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.1Exploit: None knownExposed: 0

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

A Path Traversal vulnerability exists in Quick.CMS through the URI path component of HTTP requests, where the server fails to normalize dot-dot-slash (../) sequences before resolving and serving the requested file. An authenticated attacker with admin privileges can use this vulnerability to read contents of files located in the sibling directory of the webroot via a crafted HTTP request containing ../ sequences in the URI.

The vendor assessed the likelihood of exploitation as very low and determined that a fix is not necessary.

CVSS v3
5.1
EG Score
5.1(medium)
EG Risk
23(Track)
EG Risk 23/100SSVC: 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
Severity51% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

July 28, 2026

Last Modified

July 30, 2026

Advisory Details (2)

Auto-updated Jul 28, 2026
No patch confirmed yet.
generic

Free shopping cart and content management system (CMS) - OpenSolution.org

https://opensolution.org/
generic

Vulnerabilities in Quick.CMS software | CERT Polska

https://cert.pl/en/posts/2026/07/CVE-2026-63301

Vendor Advisories for CVE-2026-63303(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 / 69× 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 05:19 UTCEG score recompute
  2. 2026-09-19 05:19 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 02:09 UTCEG score recompute
  5. 2026-09-18 02:09 UTCGHSA enrichment
  6. 2026-09-16 14:08 UTCEPSS rescore
  7. 2026-09-16 11:51 UTCEG score recompute
  8. 2026-09-16 11:51 UTCGHSA enrichment
  9. 2026-09-16 05:15 UTCEPSS rescore
  10. 2026-09-15 08:51 UTCEG score recompute
  11. 2026-09-15 08:51 UTCGHSA enrichment
  12. 2026-09-14 03:39 UTCEG score recompute
  13. 2026-09-14 03:39 UTCGHSA enrichment
  14. 2026-09-13 04:44 UTCEG score recompute
  15. 2026-09-13 04:44 UTCGHSA enrichment
  16. 2026-09-12 05:43 UTCEG score recompute
  17. 2026-09-12 05:43 UTCGHSA enrichment
  18. 2026-09-11 14:53 UTCEPSS rescore
  19. 2026-09-11 09:37 UTCEPSS rescore
  20. 2026-09-11 06:45 UTCEG score recompute
  21. 2026-09-11 06:45 UTCGHSA enrichment
  22. 2026-09-10 07:49 UTCGHSA enrichment
  23. 2026-09-09 08:05 UTCEG score recompute
  24. 2026-09-09 08:05 UTCGHSA enrichment
  25. 2026-09-08 22:01 UTCEPSS rescore
Show 75 more
  1. 2026-09-07 20:56 UTCEG score recompute
  2. 2026-09-07 20:56 UTCGHSA enrichment
  3. 2026-09-07 16:01 UTCEPSS rescore
  4. 2026-09-06 13:47 UTCEPSS rescore
  5. 2026-09-06 10:33 UTCEG score recompute
  6. 2026-09-06 10:33 UTCGHSA enrichment
  7. 2026-09-05 15:31 UTCEPSS rescore
  8. 2026-09-05 11:36 UTCEG score recompute
  9. 2026-09-05 11:36 UTCGHSA enrichment
  10. 2026-09-04 12:05 UTCEG score recompute
  11. 2026-09-04 12:05 UTCGHSA enrichment
  12. 2026-09-04 05:07 UTCEPSS rescore
  13. 2026-09-02 14:12 UTCEPSS rescore
  14. 2026-09-01 23:45 UTCEG score recompute
  15. 2026-09-01 23:45 UTCGHSA enrichment
  16. 2026-09-01 13:54 UTCEPSS rescore
  17. 2026-09-01 04:40 UTCEPSS rescore
  18. 2026-09-01 00:49 UTCGHSA enrichment
  19. 2026-08-30 22:31 UTCEG score recompute
  20. 2026-08-30 22:31 UTCGHSA enrichment
  21. 2026-08-30 19:17 UTCEPSS rescore
  22. 2026-08-30 01:22 UTCEPSS rescore
  23. 2026-08-29 23:35 UTCEG score recompute
  24. 2026-08-29 23:35 UTCGHSA enrichment
  25. 2026-08-28 21:42 UTCEPSS rescore
  26. 2026-08-27 14:25 UTCEPSS rescore
  27. 2026-08-27 11:39 UTCEG score recompute
  28. 2026-08-27 11:39 UTCGHSA enrichment
  29. 2026-08-26 14:46 UTCEPSS rescore
  30. 2026-08-26 12:42 UTCEG score recompute
  31. 2026-08-26 12:42 UTCGHSA enrichment
  32. 2026-08-25 13:49 UTCEPSS rescore
  33. 2026-08-25 13:28 UTCGHSA enrichment
  34. 2026-08-24 14:29 UTCEG score recompute
  35. 2026-08-24 14:29 UTCGHSA enrichment
  36. 2026-08-23 15:30 UTCEG score recompute
  37. 2026-08-23 15:30 UTCGHSA enrichment
  38. 2026-08-23 00:19 UTCEPSS rescore
  39. 2026-08-22 16:35 UTCEG score recompute
  40. 2026-08-22 16:35 UTCGHSA enrichment
  41. 2026-08-21 23:49 UTCEPSS rescore
  42. 2026-08-21 17:39 UTCEG score recompute
  43. 2026-08-21 17:39 UTCGHSA enrichment
  44. 2026-08-20 22:55 UTCEPSS rescore
  45. 2026-08-20 18:43 UTCGHSA enrichment
  46. 2026-08-19 19:47 UTCEG score recompute
  47. 2026-08-19 19:47 UTCGHSA enrichment
  48. 2026-08-19 17:04 UTCEPSS rescore
  49. 2026-08-18 20:33 UTCEG score recompute
  50. 2026-08-18 20:33 UTCGHSA enrichment
  51. 2026-08-18 13:48 UTCEPSS rescore
  52. 2026-08-17 21:37 UTCEG score recompute
  53. 2026-08-17 21:37 UTCGHSA enrichment
  54. 2026-08-17 13:47 UTCEPSS rescore
  55. 2026-08-16 22:39 UTCEG score recompute
  56. 2026-08-16 22:39 UTCGHSA enrichment
  57. 2026-08-16 14:56 UTCEPSS rescore
  58. 2026-08-15 23:43 UTCEG score recompute
  59. 2026-08-15 23:43 UTCGHSA enrichment
  60. 2026-08-15 01:30 UTCEPSS rescore
  61. 2026-08-15 00:47 UTCGHSA enrichment
  62. 2026-08-14 01:51 UTCEG score recompute
  63. 2026-08-14 01:51 UTCGHSA enrichment
  64. 2026-08-13 22:00 UTCEPSS rescore
  65. 2026-08-13 02:55 UTCEG score recompute
  66. 2026-08-13 02:55 UTCGHSA enrichment
  67. 2026-08-12 13:51 UTCEPSS rescore
  68. 2026-08-12 04:00 UTCEG score recompute
  69. 2026-08-12 04:00 UTCGHSA enrichment
  70. 2026-08-11 05:04 UTCEG score recompute
  71. 2026-08-11 05:04 UTCGHSA enrichment
  72. 2026-08-11 00:00 UTCEPSS rescore
  73. 2026-08-10 06:08 UTCEG score recompute
  74. 2026-08-10 06:08 UTCGHSA enrichment
  75. 2026-08-09 13:47 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-63303?
CVE-2026-63303 is a medium vulnerability published on July 28, 2026. A Path Traversal vulnerability exists in Quick.CMS through the URI path component of HTTP requests, where the server fails to normalize dot-dot-slash (../) sequences before resolving and serving the requested file. An authenticated attacker with admin privileges can use this vulnerability to read…
When was CVE-2026-63303 disclosed?
CVE-2026-63303 was first published in the National Vulnerability Database on July 28, 2026, with the most recent update 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-2026-63303 actively exploited?
CVE-2026-63303 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 66.9% of all scored CVEs.
What is the CVSS score of CVE-2026-63303?
CVE-2026-63303 has a CVSS v3 base score of 5.1 (NVD).
How do I remediate CVE-2026-63303?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63303, 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-2026-63303

Explore →

Is Your Infrastructure Affected by CVE-2026-63303?

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

Start Free Scan →Browse All CVEs