CVE-2022-4850Network attack vector

Integrity impact via missing CSRF middleware

Published Dec 29, 2022 · Updated Apr 10, 2025

Cross-Site Request Forgery in Memos before 0.9.1 allows remote attackers to alter data via forged requests. The server lacked Echo CSRF middleware and issued session cookies without SameSite protection, so a victim browser could submit cross-site state-changing requests. Exploitation requires a victim to visit attacker-controlled content while authenticated; the documented impact is integrity loss without confidentiality or availability impact.

CVSS severity6.5
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-Site Request Forgery in Memos before 0.9.1 allows remote attackers to alter data via forged requests. The server lacked Echo CSRF middleware and issued session cookies without SameSite protection, so a victim browser could submit cross-site state-changing requests. Exploitation requires a victim to visit attacker-controlled content while authenticated; the documented impact is integrity loss without confidentiality or availability impact.

The record

CVE
CVE-2022-4850
Published
Dec 29, 2022
Updated
Apr 10, 2025
Vendor
Memos
Product
Memos
Classifications
CWE-352, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 29, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 10, 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=unspecified <0.9.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Memos · Memosversion=unspecified <0.9.1

Published CVSS scores

6.5NVDCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1190Exploit Public-Facing Application

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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