CVE-2025-0520

CRITICALNVD 9.4Elevated

9.4

An unrestricted file upload vulnerability in ShowDoc caused by improper validation of file extension allows execution of arbitrary PHP, leading to remote code execution.This issue affects ShowDoc: before 2.8.7.

CVSS v3: 9.4
EG Score: 0.0(none)
EPSS: 84.1%
KEV: Not listed

Published

April 29, 2025

Last Modified

April 15, 2026

References (4)

disclosure@vulncheckhttps://github.com/star7th/showdoc/pull/1059
disclosure@vulncheckhttps://github.com/vulhub/vulhub/tree/master/showdoc/CNVD-2020-26585
disclosure@vulncheckhttps://www.cnvd.org.cn/flaw/show/CNVD-2020-26585
disclosure@vulncheckhttps://www.vulncheck.com/advisories/showdoc-unauthenticated-file-upload-rce

Affected Packages

(1 across 1 ecosystem)

Packagist(1)

Package	Vulnerable range	Fixed in	Dependents
showdoc/showdoc	v1.0.0 ... v2.8.6 (107 versions)	2.8.7	—

Weakness Classification(1)

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

CWE-434Unrestricted Upload of File with Dangerous Type

Data Freshness Timeline

(refreshed 15× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-06 13:47 UTCepss_batch
2026-06-06 13:46 UTCepss_batch
2026-06-05 22:46 UTCepss_batch
2026-06-05 22:46 UTCepss_batch
2026-06-05 06:10 UTCepss_batch
2026-06-05 06:09 UTCepss_batch
2026-06-04 13:11 UTCepss_batch
2026-06-04 13:11 UTCepss_batch
2026-06-03 09:10 UTCOSV refresh
2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch

Frequently asked(5)

What is CVE-2025-0520?

CVE-2025-0520 is a critical vulnerability published on April 29, 2025. An unrestricted file upload vulnerability in ShowDoc caused by improper validation of file extension allows execution of arbitrary PHP, leading to remote code execution.This issue affects ShowDoc: before 2.8.7.

When was CVE-2025-0520 disclosed?

CVE-2025-0520 was first published in the National Vulnerability Database on April 29, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-0520 actively exploited?

CVE-2025-0520 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 84.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-0520?

CVE-2025-0520 has a CVSS v3 base score of 9.4 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 0.0.

How do I remediate CVE-2025-0520?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-0520, 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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CVE-2025-0520

📅 Published

🔄 Last Modified

🔗 References (4)

Affected Packages

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-0520?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)