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Vulnerability details: VCID-c77c-87m4-wkaw
Vulnerability ID VCID-c77c-87m4-wkaw
Aliases CVE-2025-0520
GHSA-6jmr-r7p6-f5wr
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-434 Unrestricted Upload of File with Dangerous Type
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.02105 https://api.first.org/data/v1/epss?cve=CVE-2025-0520
epss 0.02105 https://api.first.org/data/v1/epss?cve=CVE-2025-0520
cvssv4 9.4 https://github.com/star7th/showdoc
generic_textual CRITICAL https://github.com/star7th/showdoc
cvssv4 9.4 https://github.com/star7th/showdoc/pull/1059
generic_textual CRITICAL https://github.com/star7th/showdoc/pull/1059
ssvc Track* https://github.com/star7th/showdoc/pull/1059
cvssv4 9.4 https://github.com/vulhub/vulhub/tree/master/showdoc/CNVD-2020-26585
generic_textual CRITICAL https://github.com/vulhub/vulhub/tree/master/showdoc/CNVD-2020-26585
ssvc Track* https://github.com/vulhub/vulhub/tree/master/showdoc/CNVD-2020-26585
cvssv4 9.4 https://nvd.nist.gov/vuln/detail/CVE-2025-0520
generic_textual CRITICAL https://nvd.nist.gov/vuln/detail/CVE-2025-0520
cvssv4 9.4 https://www.cnvd.org.cn/flaw/show/CNVD-2020-26585
generic_textual CRITICAL https://www.cnvd.org.cn/flaw/show/CNVD-2020-26585
ssvc Track* https://www.cnvd.org.cn/flaw/show/CNVD-2020-26585
cvssv4 9.4 https://www.vulncheck.com/advisories/showdoc-unauthenticated-file-upload-rce
generic_textual CRITICAL https://www.vulncheck.com/advisories/showdoc-unauthenticated-file-upload-rce
ssvc Track* https://www.vulncheck.com/advisories/showdoc-unauthenticated-file-upload-rce
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2025-0520
https://github.com/star7th/showdoc
https://nvd.nist.gov/vuln/detail/CVE-2025-0520
1059 https://github.com/star7th/showdoc/pull/1059
CNVD-2020-26585 https://github.com/vulhub/vulhub/tree/master/showdoc/CNVD-2020-26585
CNVD-2020-26585 https://www.cnvd.org.cn/flaw/show/CNVD-2020-26585
GHSA-6jmr-r7p6-f5wr https://github.com/advisories/GHSA-6jmr-r7p6-f5wr
showdoc-unauthenticated-file-upload-rce https://www.vulncheck.com/advisories/showdoc-unauthenticated-file-upload-rce
No exploits are available.
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L Found at https://github.com/star7th/showdoc
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L Found at https://github.com/star7th/showdoc/pull/1059
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2025-04-29T20:38:44Z/ Found at https://github.com/star7th/showdoc/pull/1059
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L Found at https://github.com/vulhub/vulhub/tree/master/showdoc/CNVD-2020-26585
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2025-04-29T20:38:44Z/ Found at https://github.com/vulhub/vulhub/tree/master/showdoc/CNVD-2020-26585
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L Found at https://nvd.nist.gov/vuln/detail/CVE-2025-0520
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L Found at https://www.cnvd.org.cn/flaw/show/CNVD-2020-26585
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

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Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2025-04-29T20:38:44Z/ Found at https://www.cnvd.org.cn/flaw/show/CNVD-2020-26585
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L Found at https://www.vulncheck.com/advisories/showdoc-unauthenticated-file-upload-rce
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2025-04-29T20:38:44Z/ Found at https://www.vulncheck.com/advisories/showdoc-unauthenticated-file-upload-rce
Exploit Prediction Scoring System (EPSS)
Percentile 0.8445
EPSS Score 0.02105
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T17:14:30.820805+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2025/0xxx/CVE-2025-0520.json 38.6.0