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Memos CVE-2025-56761

MEDIUM
Cross-site Scripting (XSS) (CWE-79)
2025-09-03 cve@mitre.org
XSS Memos Suse Usememos
5.4
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
CWE-79
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

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Impact

CVSS score of 5.4 (MEDIUM). Attack characteristics: network attack vector, low complexity, low privileges required, user interaction required. Public proof-of-concept exploit code is available. EPSS exploitation probability: 0.03%.
Exploit ScenarioDerived

A remote attacker could inject malicious scripts into web pages viewed by other users by sending crafted requests to the affected application.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 28, 2026

Memos 0.22 is vulnerable to Stored Cross site scripting (XSS) vulnerabilities by the upload attachment and user avatar features. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.

Affected Packages

go github.com/usememos/memos no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in go

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Technical ContextAI · show details

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. Memos 0.22 is vulnerable to Stored Cross site scripting (XSS) vulnerabilities by the upload attachment and user avatar features. Memos does not verify the content type of the uploaded data and serve it back as is. An authenticated attacker can use this to elevate their privileges when the stored XSS is viewed by an admin. Affected products include: Usememos Memos.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 5.4 MEDIUM
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
SUSE MEDIUM

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

3
Patch released
Apr 06, 2026 - 20:30 nvd
Patch available
PoC Detected
Sep 09, 2025 - 18:27 vuln.today
Public exploit code
CVE Published
Sep 03, 2025 - 17:15 nvd
MEDIUM 5.4

DescriptionCVE.org

Memos 0.22 is vulnerable to Stored Cross site scripting (XSS) vulnerabilities by the upload attachment and user avatar features. Memos does not verify the content type of the uploaded data and serve it back as is. An authenticated attacker can use this to elevate their privileges when the stored XSS is viewed by an admin.

Executive ViewAI

Why It Matters

Organizations using Memos 0.22 should be aware of moderate risk from CVE-2025-56761, a cross-site scripting vulnerability rated CVSS 5.4. Attackers could inject scripts to steal sessions or perform actions as authenticated users. Proof-of-concept code is publicly available. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Low
Compensating Controls

Apply vendor patch. If patching is delayed: implement CSP headers, enable HttpOnly cookies, deploy WAF XSS rules.

Threat Intelligence Overview

EPSS Score
0.0%
Top 90% exploitable
Exploit
POC
Public exploit code exists
Data Quality
4 sources
Confidence: Medium
NVD CVE.org EPSS Vendor GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC Yes
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
Poc
System Exposure· derived
Open
Automatable· derived
No
Human Impact
Low

Priority Score

47
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +27
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Cross-Site Scripting MEDIUM

Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.

Affected Products (CPE)CVE.org

cpe:2.3:a:usememos:memos:0.22.0:*:*:*:*:*:*:*

More in Memos

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Authorization Bypass Through User-Controlled Key in GitHub repository usememos/memos prior to 0.9.0. Rated critical seve
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Cross-site Scripting (XSS) - Stored in GitHub repository usememos/memos prior to 0.9.1. Rated critical severity (CVSS 9.
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Cross-site Scripting (XSS) - Stored in GitHub repository usememos/memos prior to 0.9.1. Rated critical severity (CVSS 9.
CVE-2023-5036 HIGH POC
8.8 Sep 18

Cross-Site Request Forgery (CSRF) in GitHub repository usememos/memos prior to 0.15.1. Rated high severity (CVSS 8.8), t
CVE-2023-4697 HIGH POC
8.8 Sep 01

Improper Privilege Management in GitHub repository usememos/memos prior to 0.13.2. Rated high severity (CVSS 8.8), this

CVE-2022-4844 HIGH POC
8.8 Dec 29

Cross-Site Request Forgery (CSRF) in GitHub repository usememos/memos prior to 0.9.1. Rated high severity (CVSS 8.8), th
CVE-2022-4809 HIGH POC
8.8 Dec 28

Improper Access Control in GitHub repository usememos/memos prior to 0.9.1. Rated high severity (CVSS 8.8), this vulnera
CVE-2022-4808 HIGH POC
8.8 Dec 28

Improper Privilege Management in GitHub repository usememos/memos prior to 0.9.1. Rated high severity (CVSS 8.8), this v
CVE-2022-4803 HIGH POC
8.8 Dec 28

Authorization Bypass Through User-Controlled Key in GitHub repository usememos/memos prior to 0.9.1. Rated high severity
CVE-2022-4689 HIGH POC
8.8 Dec 23

Improper Access Control in GitHub repository usememos/memos prior to 0.9.0. Rated high severity (CVSS 8.8), this vulnera
CVE-2022-4688 HIGH POC
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Improper Authorization in GitHub repository usememos/memos prior to 0.9.0. Rated high severity (CVSS 8.8), this vulnerab

Same weakness CWE-79 – Cross-site Scripting (XSS)

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CVE-2020-3580 MEDIUM POC
6.1
CVE-2013-7389 MEDIUM POC
4.3
CVE-2021-25299 MEDIUM POC
6.1
CVE-2014-2120 MEDIUM
6.1
CVE-2023-40000 HIGH POC
8.3
CVE-2016-8581 MEDIUM POC
6.1
CVE-2013-5223 MEDIUM POC
5.4
CVE-2025-52367 MEDIUM POC
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Same technique XSS

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CVE-2017-9248 CRITICAL POC
9.8
CVE-2013-1710 CRITICAL POC
10.0
CVE-2024-52875 HIGH POC
8.8

Vendor StatusVendor

SUSE

Severity: Medium
Product Status
Container suse/sl-micro/6.0/baremetal-os-container:latest Container suse/sl-micro/6.0/base-os-container:latest Container suse/sl-micro/6.0/toolbox:latest Image SL-Micro Image SL-Micro-Base Image SL-Micro-Base-RT Image SL-Micro-Base-RT-SelfInstall Image SL-Micro-Base-RT-encrypted Image SL-Micro-Base-SelfInstall Image SL-Micro-Base-encrypted Image SL-Micro-Base-qcow Image SL-Micro-Default Image SL-Micro-Default-SelfInstall Image SL-Micro-Default-encrypted Image SL-Micro-Default-qcow Image SLE-Micro Image SLE-Micro-Azure Image SLE-Micro-BYOS Image SLE-Micro-BYOS-Azure Image SLE-Micro-BYOS-EC2 Image SLE-Micro-BYOS-GCE Image SLE-Micro-EC2 Image SLE-Micro-GCE Affected
openSUSE Tumbleweed Fixed

References

Advisories & patches
REF https://github.com/usememos/memos/blob/v0.24.0/server/router/api/v1/user_service.go#L147 REF https://github.com/usememos/memos/blob/v0.24.4/server/router/api/v1/resource_service.go#L48

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