TI-2022-08993 Aliases CVE-2022-25299 GHSA-q66h-r8q8-x284

Arbitrary file write in cesanta/mongoose

MEDIUM 45CWE-552Published 2022-02-18 · Updated 2024-09-16

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-552.

Summary

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.

Why it matters now

EPSS 0.01394 72nd percentileScored 2026-11-07

Fix Fixed cesanta/mongoose: 7.6

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	cesanta/mongoose	before 7.6	7.6	Patch available	CNA

cesanta/mongoose Vendor— Affected before 7.6 Fixed in 7.6 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:cesanta:mongoose::::::::	before 7.6	Vulnerable	Cesanta

cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:* Versions before 7.6 Vulnerable ·Cesanta

Remediation

Fix · CNA cesanta/mongoose Fixed in 7.6

Timeline

2026-10-02 Threatist record created from CVE-2022-25299
2026-10-03 Alias added: GHSA-q66h-r8q8-x284

References

Patch 1

https://github.com/cesanta/mongoose/commit/c65c8fdaaa257e0487ab0aaae9e8f6b439335945

TI-2026-51393 Mongoose: Content-Length + Transfer-Encoding coexistence enables request smuggling CVSS 3.1CRITICAL 9.1
TI-2026-51389 Mongoose: TLS Hostname Verification Bypass via Overly Permissive Wildcard Matching CVSS 4.0CRITICAL 9.1
TI-2023-02723 Cesanta Mongoose MQTT Message Parsing Heap Overflow CVSS 3.1HIGH 8.8
TI-2020-15865 Buffer overflow in mg_resolve_from_hosts_file in Mongoose 6.18, when reading from a crafted hosts file. CVSS 3.1HIGH 8.8
TI-2023-17032 The HTTP server in Mongoose before 7.10 accepts requests containing negative… CVSS 3.1HIGH 7.5
TI-2026-06113 Cesanta Mongoose TCP Option net_builtin.c handle_opt infinite loop CVSS 4.0MEDIUM 6.9

See all 54 →

Sources

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