CVE-2022-4849Public exploitNetwork attack vector

Unauthorized data changes via missing CSRF validation

Published Dec 29, 2022 · Updated Apr 9, 2025

Cross-site request forgery in Memos before 0.9.1 allows remote attackers to change data through a signed-in user's browser. The server accepts state-changing API requests without validating a CSRF token, and its session cookie lacks the SameSite=Strict attribute. Exploitation requires an authenticated user to load attacker-controlled content; resulting requests execute with that user's permissions.

CVSS severity6.5
Medium
EPSS probability0.35%
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 change data through a signed-in user's browser. The server accepts state-changing API requests without validating a CSRF token, and its session cookie lacks the SameSite=Strict attribute. Exploitation requires an authenticated user to load attacker-controlled content; resulting requests execute with that user's permissions.

The record

CVE
CVE-2022-4849
Published
Dec 29, 2022
Updated
Apr 9, 2025
Vendor
Memos
Product
Memos
Classifications
CWE-352
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 29, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 9, 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 privilegesunauthenticated

What is affected?

Memos · Memosversion=unspecified <0.9.1

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
8.3huntr.devCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A: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.

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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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)

Public exploit references

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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