# CVE-2024-40886: One-click Client-Side Path Traversal Leading to CSRF in User Management admin page > Attackers can exploit client-side path traversal to perform CSRF attacks on the User Management admin page, potentially modifying user settings. - **Severity:** Medium 4.6 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L`) - **Exploited in the wild:** Not known - **Login needed:** Any signed-in user - **Attackable:** Over the internet - **Victim action needed:** A user has to click or open something - **Fix available:** Yes - **Published:** 22 Aug 2024 - **Updated:** 22 Aug 2024 - **Also known as:** GHSA-hrf9-rm95-fpf3, GO-2024-3097 ## What is CVE-2024-40886? CVE-2024-40886 is a medium-severity vulnerability in Mattermost Mattermost, published on 22 Aug 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link. ### Official description Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.x <= 9.10.0, 9.8.x <= 9.8.2 fail to sanitize user inputs in the frontend that are used for redirection which allows for a one-click client-side path traversal that is leading to CSRF in User Management page of the system console. Weakness: CWE-352 (Cross-Site Request Forgery) ## Which versions are affected by CVE-2024-40886? 12 open source packages ship an affected version, including github.com/mattermost/mattermost/server/v8, github.com/mattermost/mattermost-server and github.com/mattermost/mattermost-server/v5. It affects 1 product. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `github.com/mattermost/mattermost/server/v8` | Go | All versions | None | | `github.com/mattermost/mattermost/server/v8` | Go | From 9.10.0 | 9.10.1 | | `github.com/mattermost/mattermost/server/v8` | Go | From 9.10.0 | 9.10.1 | | `github.com/mattermost/mattermost/server/v8` | Go | From 9.5.0 | 9.5.8 | | `github.com/mattermost/mattermost/server/v8` | Go | From 9.5.0 | 9.5.8 | | `github.com/mattermost/mattermost/server/v8` | Go | From 9.8.0 | 9.8.3 | | `github.com/mattermost/mattermost/server/v8` | Go | From 9.8.0 | 9.8.3 | | `github.com/mattermost/mattermost/server/v8` | Go | From 9.9.0 | 9.9.2 | | `github.com/mattermost/mattermost/server/v8` | Go | From 9.9.0 | 9.9.2 | | `github.com/mattermost/mattermost-server` | Go | From 9.5.0+incompatible | 9.5.8+incompatible, 9.8.3+incompatible, 9.9.2+incompatible, 9.10.1+incompatible | | `github.com/mattermost/mattermost-server/v5` | Go | All versions | None | | `github.com/mattermost/mattermost-server/v6` | Go | All versions | None | Products: Mattermost Mattermost. ## How do I fix CVE-2024-40886? Upgrade github.com/mattermost/mattermost/server/v8 to a fixed version for your release line: 9.10.1, 9.5.8, 9.8.3 or 9.9.2. ## Is CVE-2024-40886 being exploited? There is no known exploitation of CVE-2024-40886 in the wild and no public exploit code. ## Other vulnerabilities in Mattermost Mattermost - [CVE-2019-20851](https://insights.sbomify.com/CVE-2019-20851/): Path traversal in n/a (critical 9.1) - [CVE-2024-39274](https://insights.sbomify.com/CVE-2024-39274/): Malicious remote can add users to arbitrary teams and channels (high 8.7) - [CVE-2024-39777](https://insights.sbomify.com/CVE-2024-39777/): Malicious remote can invite itself to an arbitrary local channel (high 8.7) - [CVE-2024-39830](https://insights.sbomify.com/CVE-2024-39830/): Timing attack during remote cluster token comparison when shared channels are enabled (high 8.1) - [CVE-2023-3615](https://insights.sbomify.com/CVE-2023-3615/): Lack of server certificate validation in websockets connection (high 8.1) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2024-40886 and fix it if it is affected. What it is: CVE-2024-40886 is a medium-severity vulnerability in Mattermost Mattermost, published on 22 Aug 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link. Exploitation: There is no known exploitation of CVE-2024-40886 in the wild and no public exploit code. Affected packages and fixed versions: - github.com/mattermost/mattermost/server/v8 (Go): affected all versions; no fix listed - github.com/mattermost/mattermost/server/v8 (Go): affected from 9.10.0; fixed in 9.10.1 - github.com/mattermost/mattermost/server/v8 (Go): affected from 9.10.0; fixed in 9.10.1 - github.com/mattermost/mattermost/server/v8 (Go): affected from 9.5.0; fixed in 9.5.8 - github.com/mattermost/mattermost/server/v8 (Go): affected from 9.5.0; fixed in 9.5.8 - github.com/mattermost/mattermost/server/v8 (Go): affected from 9.8.0; fixed in 9.8.3 - github.com/mattermost/mattermost/server/v8 (Go): affected from 9.8.0; fixed in 9.8.3 - github.com/mattermost/mattermost/server/v8 (Go): affected from 9.9.0; fixed in 9.9.2 - github.com/mattermost/mattermost/server/v8 (Go): affected from 9.9.0; fixed in 9.9.2 - github.com/mattermost/mattermost-server (Go): affected from 9.5.0+incompatible; fixed in 9.5.8+incompatible, 9.8.3+incompatible, 9.9.2+incompatible, 9.10.1+incompatible - github.com/mattermost/mattermost-server/v5 (Go): affected all versions; no fix listed - github.com/mattermost/mattermost-server/v6 (Go): affected all versions; no fix listed Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2024-40886/ (Markdown: https://insights.sbomify.com/CVE-2024-40886/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2024-40886 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-40886 - OSV: https://osv.dev/vulnerability/CVE-2024-40886 --- From sbomify Insights: https://insights.sbomify.com/CVE-2024-40886/ Summaries are generated and may contain mistakes; the official description above is the record.