CVE-2023-51763

Code execution via unsanitized CSV formulas

Published Dec 24, 2023 · Updated Feb 23, 2026

CSV injection in ActiveAdmin before 3.2.0 allows remote authenticated users to trigger code execution or data exfiltration via crafted admin data. The CSVBuilder writes column names and row values beginning with formula-control characters into CSV output without prefixing an apostrophe. Exploitation requires permission to upload the exported data and a victim who opens the CSV in a spreadsheet and permits formula evaluation.

CVSS severity5.2
Medium
EPSS probability0.94%
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 ActiveAdmin before 3.2.0 allows remote authenticated users to trigger code execution or data exfiltration via crafted admin data. The CSVBuilder writes column names and row values beginning with formula-control characters into CSV output without prefixing an apostrophe. Exploitation requires permission to upload the exported data and a victim who opens the CSV in a spreadsheet and permits formula evaluation.

The record

CVE
CVE-2023-51763
Published
Dec 24, 2023
Updated
Feb 23, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-1236, T1204.002
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 23, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.2GitHub Advisory DatabaseCVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L
9.8NIST NVDCVSS: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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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