CVE-2025-0520
Unrestricted file upload leads to PHP RCE in ShowDoc <2.8.7
Is CVE-2025-0520 being exploited?
Not confirmed. CVE-2025-0520 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 2.6% probability of exploitation in the next 30 days.
How severe is CVE-2025-0520?
CVE-2025-0520 is rated Critical. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2025-0520?
Yes. A fix has been recorded for CVE-2025-0520. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2025-0520 affect?
CVE-2025-0520 affects ShowDoc (before 2.8.7). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2025-0520?
Upgrade to 2.8.7+ or patch; validate uploads.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution via uploaded PHP file; attacker can run arbitrary code on server.
Immediate action required
- affected< 2.8.7
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.