A vulnerability was detected in SourceCodester Online Book Store System 1.0. The affected element is an unknown function of the file /admin/index.php of the component Administrative Interface. Performing a manipulation of the argument page results in improper control of filename for include/require statement in php program. It is possible to initiate the attack remotely. The exploit is now public and may be used.
CVE-2026-15540
MEDIUMPre-NVD 4.34.3—Trending — 5 sources updated this weekElevated
EchelonGraph scoreHIGH confidence
Score 4.3 from GitHub Security Advisory (severity: LOW) published 2026-07-13. a secondary CVSS source baseline 4.3; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
4.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.3Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 4.3
- EG Score
- 4.3(high)
- EPSS
- 15.3%
- KEV
- Not listed
Published
July 13, 2026
Last Modified
July 13, 2026
Advisory Details (1)
Auto-updated Jul 13, 2026No patch confirmed yet.
Vendor Advisories for CVE-2026-15540(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 12× in last 7d / 12× 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.
- 2026-07-15 16:57 UTCEPSS rescore
- 2026-07-15 12:29 UTCEG score recompute
- 2026-07-15 12:29 UTCGHSA enrichment
- 2026-07-15 02:00 UTCEPSS rescore
- 2026-07-14 10:05 UTCEG score recompute
- 2026-07-14 10:05 UTCGHSA enrichment
- 2026-07-13 22:30 UTCEPSS rescore
- 2026-07-13 20:08 UTCNVD updateCVSS v4 → 2.1
- 2026-07-13 18:57 UTCMITRE cvelistV5CVSS v4 → 5.3
- 2026-07-13 08:21 UTCNVD updateCVSS v4 → 2.1
- 2026-07-13 07:43 UTCEG score recompute
- 2026-07-13 07:42 UTCMITRE cvelistV5first tracked
Frequently asked(5)
What is CVE-2026-15540?
CVE-2026-15540 is a medium vulnerability published on July 13, 2026. A vulnerability was detected in SourceCodester Online Book Store System 1.0. The affected element is an unknown function of the file /admin/index.php of the component Administrative Interface. Performing a manipulation of the argument page results in improper control of filename for include/require…
When was CVE-2026-15540 disclosed?
CVE-2026-15540 was first published in the National Vulnerability Database on July 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15540 actively exploited?
CVE-2026-15540 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-15540?
CVE-2026-15540 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-15540?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15540, 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-2026-15540
Is Your Infrastructure Affected by CVE-2026-15540?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.