CVE-2026-65875Network attack vector

Code execution via unneutralized CSV formulas

Published Aug 3, 2026 · Updated Aug 3, 2026

CSV injection in baserCMS before 5.3.0 allows remote attackers to execute malicious formulas when a user opens an exported CSV file. baserCMS does not neutralize formula-leading values before writing attacker-controlled data to CSV, but the affected export path and fields are undisclosed. Exploitation requires a user to download and open the generated file in formula-interpreting software, where the payload can execute scripts or commands.

CVSS severity5.1
Medium
EPSS probability0.15%
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 baserCMS before 5.3.0 allows remote attackers to execute malicious formulas when a user opens an exported CSV file. baserCMS does not neutralize formula-leading values before writing attacker-controlled data to CSV, but the affected export path and fields are undisclosed. Exploitation requires a user to download and open the generated file in formula-interpreting software, where the payload can execute scripts or commands.

The record

CVE
CVE-2026-65875
Published
Aug 3, 2026
Updated
Aug 3, 2026
Vendor
baserCMS Users Community
Product
baserCMS
Classifications
CWE-1236, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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 <5.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

baserCMS Users Community · baserCMSversion=0 <5.3.0

Published CVSS scores

7.1JPCERT/CC and IPACVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
5.1JPCERT/CC and IPACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:L

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 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.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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