CVE-2022-1544Public exploit

Code execution via unsanitized CSV formula values

Published May 1, 2022 · Updated Aug 3, 2024

CSV formula injection in LUYA Yii Framework Helpers before 1.2.1 allows attackers to execute spreadsheet formulas through exported data. ExportHelper::generateRow quotes each value but fails to neutralize leading equals, plus, minus, at-sign, tab, or newline characters before building a CSV row. Exploitation requires a recipient to open the attacker-influenced export in spreadsheet software, enabling code execution or confidential-data exfiltration in that user's context.

CVSS severity7.8
High
EPSS probability2.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSV formula injection in LUYA Yii Framework Helpers before 1.2.1 allows attackers to execute spreadsheet formulas through exported data. ExportHelper::generateRow quotes each value but fails to neutralize leading equals, plus, minus, at-sign, tab, or newline characters before building a CSV row. Exploitation requires a recipient to open the attacker-influenced export in spreadsheet software, enabling code execution or confidential-data exfiltration in that user's context.

The record

CVE
CVE-2022-1544
Published
May 1, 2022
Updated
Aug 3, 2024
Vendor
LUYA
Product
LUYA Yii Framework Helpers
Classifications
CWE-1236, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 1, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=unspecified <1.2.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

LUYA · LUYA Yii Framework Helpersversion=unspecified <1.2.1

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.0huntr.dev CNACVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

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
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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