CVE-2026-13521

HIGHPre-NVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

Score 7.3 from GitHub Security Advisory published 2026-06-29. a secondary CVSS source baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.3Exploit: Elevated riskExposed: 0

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

A vulnerability was identified in SourceCodester Class and Exam Timetabling System 1.0/5.php. Affected by this vulnerability is an unknown functionality of the file /preview5.php. Such manipulation of the argument course_year_section leads to sql injection. The attack may be performed from remote. The exploit is publicly available and might be used.

CVSS v3
7.3
EG Score
7.3(medium)
EG Risk
64(Attend)
EG Risk 64/100SSVC: 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
Severity73% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

June 29, 2026

Last Modified

June 29, 2026

Advisory Details (2)

Auto-updated Jun 29, 2026
No patch confirmed yet.
generic

Free Source Code Projects and Tutorials - sourcecodester.com

https://www.sourcecodester.com/
generic

sourcecodester Class and Exam Timetabling System Project V1.0 /preview5.php SQL injection · Issue #2 · xiaoxuxu233/myCVE · GitHub

https://github.com/xiaoxuxu233/myCVE/issues/2

Vendor Advisories for CVE-2026-13521(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 97× 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 194 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-13521?
CVE-2026-13521 is a high vulnerability published on June 29, 2026. A vulnerability was identified in SourceCodester Class and Exam Timetabling System 1.0/5.php. Affected by this vulnerability is an unknown functionality of the file /preview5.php. Such manipulation of the argument courseyearsection leads to sql injection. The attack may be performed from remote.…
When was CVE-2026-13521 disclosed?
CVE-2026-13521 was first published in the National Vulnerability Database on June 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-13521 actively exploited?
CVE-2026-13521 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 64.2% of all scored CVEs.
What is the CVSS score of CVE-2026-13521?
CVE-2026-13521 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-13521?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-13521, 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-2026-13521

Explore →

Is Your Infrastructure Affected by CVE-2026-13521?

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

Start Free Scan →Browse All CVEs