CVE-2022-4840 Cross-site Scripting (XSS) - Stored in usememos/memos
Stored Cross-Site Scripting in usememos/memos allows attackers to inject malicious scripts, potentially leading to code execution or account takeover.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-4840?
CVE-2022-4840 is a high-severity cross-site scripting vulnerability in Usememos Memos, published on 29 Dec 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Cross-site Scripting (XSS) - Stored in GitHub repository usememos/memos prior to 0.9.1.
Weakness: CWE-79
Which versions are affected by CVE-2022-4840?
2 open source packages ship an affected version, including github.com/usememos/memos. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/usememos/memos Go | All versions | 0.9.1 |
github.com/usememos/memos Go | All versions | 0.9.1 |
Products include Usememos Memos.
How do I fix CVE-2022-4840?
Upgrade github.com/usememos/memos to 0.9.1 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2022-4840 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-4840 exists.
Other vulnerabilities in Usememos Memos
- CVE-2025-50738 Memos has Cross-Site Scripting (XSS) Vulnerability in Image URLs
- CVE-2025-22952 Memos Server-Side Request Forgery (SSRF)
- CVE-2023-0109 Stored XSS in usememos/memos
- CVE-2023-4696 Improper Access Control in usememos/memos
- CVE-2022-4866 Cross-site Scripting (XSS) - Stored in usememos/memos
Sources
Also known as GHSA-pwhr-p68w-296x.