CVE-2021-1718 Microsoft SharePoint Server Tampering Vulnerability
High 8.0
Published
Updated
Check this codebase for CVE-2021-1718 and fix it if it is affected.
What it is: CVE-2021-1718 is a high-severity vulnerability in Microsoft Sharepoint Foundation, published on 12 Jan 2021. 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-2021-1718 in the wild and no public exploit code.
Affected product: Microsoft Sharepoint Foundation. No package-level version data is available, so check the vendor advisory linked from the reference page.
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-2021-1718/ (Markdown: https://insights.sbomify.com/CVE-2021-1718/index.md)
An attacker can tamper with data in Microsoft SharePoint Server, requiring a patch to mitigate the risk.
- 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
- None listed
What is CVE-2021-1718?
CVE-2021-1718 is a high-severity vulnerability in Microsoft Sharepoint Foundation, published on 12 Jan 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Microsoft SharePoint Server Tampering Vulnerability
Which versions are affected by CVE-2021-1718?
It affects 1 product.
Products include Microsoft Sharepoint Foundation.
How do I fix CVE-2021-1718?
No fix has been published for CVE-2021-1718 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-1718 being exploited?
There is no known exploitation of CVE-2021-1718 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Sharepoint Foundation
- CVE-2014-2816 Privilege escalation in n/a
- CVE-2023-21742 Microsoft SharePoint Server Remote Code Execution Vulnerability
- CVE-2023-21744 Microsoft SharePoint Server Remote Code Execution Vulnerability
- CVE-2022-44690 Microsoft SharePoint Server Remote Code Execution Vulnerability
- CVE-2022-41036 Microsoft SharePoint Server Remote Code Execution Vulnerability
Sources
Also known as GHSA-c6r7-5wvw-95cj.