CVE-2025-0781

Arbitrary file write via unchecked SGPath construction

Published Jan 28, 2025 · Updated Feb 12, 2025

Incorrect authorization in FlightGear SimGear 2020.3.19 and earlier allows attackers to write files outside the Nasal sandbox. The from_nasal_helper() conversion built an SGPath from a Nasal scalar without attaching NasalIORulesChecker, so path validation and read/write permission checks were skipped. Execution requires a user to run an untrusted Nasal script; writes remain limited to paths writable by that user's operating-system account.

CVSS severity8.6
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in FlightGear SimGear 2020.3.19 and earlier allows attackers to write files outside the Nasal sandbox. The from_nasal_helper() conversion built an SGPath from a Nasal scalar without attaching NasalIORulesChecker, so path validation and read/write permission checks were skipped. Execution requires a user to run an untrusted Nasal script; writes remain limited to paths writable by that user's operating-system account.

The record

CVE
CVE-2025-0781
Published
Jan 28, 2025
Updated
Feb 12, 2025
Vendor
FlightGear
Product
SimGear
Classifications
CWE-863, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 12, 2025Record 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 <=2020.3.19

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

FlightGear · SimGearversion=0 <=2020.3.19

Published CVSS scores

8.6GitLab Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
9.9NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1204.002Malicious 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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