CVE-2025-0520

CVE Enrichment

CVSS: 9.4 CRITICAL
EPSS: 2.45%
EPSS Percentile: 84.39%
CISA KEV: Not listed

Description

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.

Technical Details

CVSS Version: 4.0
CNA / NVD Source: [email protected]
Published: 30-Apr-2025 03:15
Last Modified: 08-Oct-2026 23:16
EPSS Date: 2026-11-04
CWE: CWE-434

CVSS 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 /
                            E:X /
                            CR:X /
                            IR:X /
                            AR:X /
                            MAV:X /
                            MAC:X /
                            MAT:X /
                            MPR:X /
                            MUI:X /
                            MVC:X /
                            MVI:X /
                            MVA:X /
                            MSC:X /
                            MSI:X /
                            MSA:X /
                            S:X /
                            AU:X /
                            R:X /
                            V:X /
                            RE:X /
                            U:X

CNA Products / Version Status

ShowDoc · ShowDoc Source: CNA · [email protected]
Default status: unaffected

0 ≤ version < 2.8.7 — affected (semver)

packageURL: pkg:composer/showdoc/showdoc

References

Last enrichment sync: 05-Nov-2026 09:46
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (3)

CVE-2025-0520 — ShowDoc (Critical) Cyble Weekly Report Tracks 1,675 Vulnerabilities and 10 KEV Additions
Tracked as CVE-2025-0520, the flaw stems from an unrestricted file upload mechanism that fails to properly validate extensions for unauthenticated users. Security Roundup: Satellite Cybersecurity Bill, Chrome Flaw and Teen Arrest
A critical unrestricted file upload vulnerability in ShowDoc (CVE-2025-0520 / CNVD-2020-26585) is being actively exploited to drop web shells and achieve remote code execution. ShowDoc CVE-2025-0520 Flaw Actively Exploited to Deploy Web Shells

CVE (15)

Malware (1)

People (4)

Threat Actors (2)

MITRE ATT&CK (5)

Vendors (13)

Products (17)

Tools (2)

Industries (3)

Countries (2)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.