CVE-2026-13521

HIGHPre-NVD 7.37.3—
EchelonGraph scoreHIGH 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
7.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.3Exploit: NoneExposed: 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(high)
EPSS
18.5%
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 38× in last 7d / 48× 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. 2026-07-07 00:23 UTCEG score recompute
  2. 2026-07-07 00:23 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 13:11 UTCEG score recompute
  5. 2026-07-06 13:11 UTCGHSA enrichment
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-06 01:53 UTCEG score recompute
  8. 2026-07-06 01:53 UTCGHSA enrichment
  9. 2026-07-05 14:40 UTCEG score recompute
  10. 2026-07-05 14:40 UTCGHSA enrichment
  11. 2026-07-05 03:26 UTCEG score recompute
  12. 2026-07-05 03:26 UTCGHSA enrichment
  13. 2026-07-05 02:30 UTCEPSS rescore
  14. 2026-07-05 02:30 UTCEPSS rescore
  15. 2026-07-04 16:14 UTCEG score recompute
  16. 2026-07-04 16:13 UTCGHSA enrichment
  17. 2026-07-04 06:31 UTCEPSS rescore
  18. 2026-07-04 05:00 UTCEG score recompute
  19. 2026-07-04 05:00 UTCGHSA enrichment
  20. 2026-07-03 17:49 UTCEG score recompute
  21. 2026-07-03 17:48 UTCGHSA enrichment
  22. 2026-07-03 06:36 UTCEG score recompute
  23. 2026-07-03 06:35 UTCGHSA enrichment
  24. 2026-07-02 19:19 UTCEG score recompute
  25. 2026-07-02 19:19 UTCGHSA enrichment
Show 23 more
  1. 2026-07-02 08:06 UTCEG score recompute
  2. 2026-07-02 08:06 UTCGHSA enrichment
  3. 2026-07-01 20:54 UTCEG score recompute
  4. 2026-07-01 20:54 UTCGHSA enrichment
  5. 2026-07-01 15:06 UTCEPSS rescore
  6. 2026-07-01 15:06 UTCEPSS rescore
  7. 2026-07-01 09:42 UTCEG score recompute
  8. 2026-07-01 09:42 UTCGHSA enrichment
  9. 2026-06-30 23:22 UTCEPSS rescore
  10. 2026-06-30 22:29 UTCEG score recompute
  11. 2026-06-30 22:29 UTCGHSA enrichment
  12. 2026-06-30 11:16 UTCEG score recompute
  13. 2026-06-30 11:16 UTCGHSA enrichment
  14. 2026-06-29 23:58 UTCEG score recompute
  15. 2026-06-29 23:58 UTCGHSA enrichment
  16. 2026-06-29 17:26 UTCNVD updateCVSS v4 → 5.5
  17. 2026-06-29 16:13 UTCMITRE cvelistV5CVSS v4 → 6.9
  18. 2026-06-29 14:06 UTCEPSS rescore
  19. 2026-06-29 12:46 UTCEG score recompute
  20. 2026-06-29 12:46 UTCGHSA enrichment
  21. 2026-06-29 04:03 UTCNVD updateCVSS v4 → 5.5
  22. 2026-06-29 01:33 UTCEG score recompute
  23. 2026-06-29 01:32 UTCMITRE cvelistV5first tracked

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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 18.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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

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