CVE-2021-47901Public exploitNetwork attack vector

Spreadsheet formula execution via unneutralized redirect cells

Published Jan 27, 2026 · Updated Jan 27, 2026

CSV injection in Mauro Soria dirsearch 0.4.1 allows remote attackers to place formulas in reports through crafted HTTP redirects. With --csv-report enabled, the CSV report writer records an attacker-controlled redirected endpoint as a cell without neutralizing formula syntax. Exploitation requires scanning a malicious server and opening the resulting report in a spreadsheet, where the formula runs in the spreadsheet user's context.

CVSS severity5.1
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSV injection in Mauro Soria dirsearch 0.4.1 allows remote attackers to place formulas in reports through crafted HTTP redirects. With --csv-report enabled, the CSV report writer records an attacker-controlled redirected endpoint as a cell without neutralizing formula syntax. Exploitation requires scanning a malicious server and opening the resulting report in a spreadsheet, where the formula runs in the spreadsheet user's context.

The record

CVE
CVE-2021-47901
Published
Jan 27, 2026
Updated
Jan 27, 2026
Vendor
Mauro Soria
Product
dirsearch
Classifications
CWE-1236, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mauro Soria · dirsearchversion=0.4.1

Published CVSS scores

5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N
9.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1236Improper Neutralization of Formula Elements in a CSV File
T1204.002User Execution: Malicious File

Public exploit references

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Technologies

Your stack

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Your stack

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