CVE-2020-17063 Microsoft Office Online Spoofing Vulnerability
Medium 6.8
Published
Updated
Check this codebase for CVE-2020-17063 and fix it if it is affected.
What it is: CVE-2020-17063 is a medium-severity vulnerability in Microsoft 365 Apps, published on 11 Nov 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-17063 in the wild and no public exploit code.
Affected product: Microsoft 365 Apps. 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-2020-17063/ (Markdown: https://insights.sbomify.com/CVE-2020-17063/index.md)
Attackers can spoof Microsoft Office Online content, potentially misleading users about the source or nature of displayed information.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-17063?
CVE-2020-17063 is a medium-severity vulnerability in Microsoft 365 Apps, published on 11 Nov 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Microsoft Office Online Spoofing Vulnerability
Which versions are affected by CVE-2020-17063?
It affects 2 products.
Products include Microsoft 365 Apps, Microsoft Office.
How do I fix CVE-2020-17063?
No fix has been published for CVE-2020-17063 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-17063 being exploited?
There is no known exploitation of CVE-2020-17063 in the wild and no public exploit code.
Other vulnerabilities in Microsoft 365 Apps
- CVE-2024-21413 Microsoft Outlook Improper Input Validation
- CVE-2023-23397 Microsoft Office Outlook Privilege Escalation
- CVE-2024-38189 Microsoft Project Remote Code Execution Vulnerability
- CVE-2023-35311 Microsoft Outlook Security Feature Bypass
- CVE-2026-21514 Microsoft Office Word Reliance on Untrusted Inputs in a Security Decision
Sources
Also known as GHSA-8vqr-9583-87j7.