What is CVE-2021-47901?

CVE-2021-47901 is a critical-severity vulnerability in Maurosoria Dirsearch, classified under Improper Neutralization of Formula Elements in a CSV File. CVSS score: 9.8/10. Published 2026-01-27.

How severe is CVE-2021-47901?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Maurosoria Dirsearch

CVE-2021-47901

Dirsearch 0.4.1 contains a CSV injection vulnerability when using the --csv-report flag that allows attackers to inject formulas through redirected endpoints. Attackers can craft malicious server redirects with comma-separated paths containing Excel formulas to manipulate the generated CSV report.

Published 2026-01-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (36.0th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.0% 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: 0.004 · change: +0.000

Affected products

Maurosoria Dirsearch — versions 0.4.1

Weakness classification (CWE)

CWE-1236 — Improper Neutralization of Formula Elements in a CSV File

References

www.exploit-db.com/exploits/49370 (exploit)
github.com/maurosoria/dirsearch (product)
www.vulncheck.com/advisories/dirsearch-csv-injection (third-party-advisory)

Frequently asked questions

What is CVE-2021-47901?: CVE-2021-47901 is a critical-severity vulnerability in Maurosoria Dirsearch, classified under Improper Neutralization of Formula Elements in a CSV File. CVSS score: 9.8/10. Published 2026-01-27.
How severe is CVE-2021-47901?: Critical severity. CVSS v3 base score is 9.8 out of 10.