CVE-2022-25299

Arbitrary File Write

9.8 Critical

This affects the package cesanta/mongoose before 7.6. The unsafe handling of file names during upload using mg_http_upload() method may enable attackers to write files to arbitrary locations outside the designated target folder.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

1.39%Up 0.5 points since Feb 19, 2022

What each source reports

CVE List Score used 9.8

Arbitrary File Write

Record: CVE-2022-25299
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

EUVDEUVD-2022-29986 9.8

Record: EUVD-2022-29986
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-03

GitHub AdvisoriesGHSA-q66h-r8q8-x284 No score

This affects the package cesanta/mongoose before 7.6. The unsafe handling of file names during...

Record: GHSA-q66h-r8q8-x284
Weakness: CWE-552
Updated: 2026-11-02

NVD 9.8

Record: CVE-2022-25299
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:P/A:N
Weakness: CWE-552
Updated: 2026-11-02

OSV 9.8

Arbitrary File Write

Record: CVE-2022-25299
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2022-25299 9.8

Record: UBUNTU-CVE-2022-25299
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Updated: 2026-11-02

Affected products

cesanta mongoose

Affected packages

Affected packages
Package	Affected	Fixed
`phantomjs` Ubuntu:16.04:LTS	All versions, plus listed versions 1.9.0-12.0.0+dfsg-12.1.1+dfsg-1	None known
`phantomjs` Ubuntu:18.04:LTS	All versions, plus listed versions 2.1.1+dfsg-2	None known
`phantomjs` Ubuntu:20.04:LTS	All versions, plus listed versions 2.1.1+dfsg-22.1.1+dfsg-2ubuntu1	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, published	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2022-25299 is a critical vulnerability (CVSS 9.8) in Cesanta Mongoose, published February 18, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.39%, the 72nd percentile. No source names a fixed version.