What is CVE-2025-6547?

CVE-2025-6547 is a vulnerability, classified under Improper Input Validation. Published 2025-06-23.

Is CVE-2025-6547 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

CVE-2025-6547

CVE-2025-6547

Improper Input Validation vulnerability in pbkdf2 allows Signature Spoofing by Improper Validation.This issue affects pbkdf2: <=3.1.2.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2025-06-23 · last modified 2026-06-17.

EPSS exploit prediction

EPSS: 0.005 (37.9th percentile), scored 2026-10-06.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001

Weakness classification (CWE)

CWE-20 — Improper Input Validation

Public proof-of-concept exploits

harborist/advisories

References

7ffcee3d-2c14-4c3e-b844-86c6a321a158 (third-party-advisory)
7ffcee3d-2c14-4c3e-b844-86c6a321a158 (patch)

Frequently asked questions

What is CVE-2025-6547?: CVE-2025-6547 is a vulnerability, classified under Improper Input Validation. Published 2025-06-23.
Is CVE-2025-6547 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.