CVE-2020-26099 Security feature bypass in n/a
High 7.5
Published
Updated
Check this codebase for CVE-2020-26099 and fix it if it is affected.
What it is: CVE-2020-26099 is a high-severity vulnerability in Cpanel Cpanel, published on 25 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-26099 in the wild and no public exploit code.
Affected product: Cpanel Cpanel. 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-2020-26099/ (Markdown: https://insights.sbomify.com/CVE-2020-26099/index.md)
Attackers can bypass SMTP greylisting protection in cPanel, allowing spam or malicious emails to bypass filtering mechanisms.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-26099?
CVE-2020-26099 is a high-severity vulnerability in Cpanel Cpanel, published on 25 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
cPanel before 88.0.3 allows attackers to bypass the SMTP greylisting protection mechanism (SEC-491).
Which versions are affected by CVE-2020-26099?
It affects 1 product.
Products include Cpanel Cpanel.
How do I fix CVE-2020-26099?
No fix has been published for CVE-2020-26099 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-26099 being exploited?
There is no known exploitation of CVE-2020-26099 in the wild and no public exploit code.
Other vulnerabilities in Cpanel Cpanel
- CVE-2026-41940 WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function
- CVE-2003-1425 guestbook.cgi in cPanel 5.0 allows remote attackers to execute arbitrary commands via the template parameter.
- CVE-2004-1769 Code injection in n/a
- CVE-2004-1770 Command injection in n/a
- CVE-2020-26098 Command injection in n/a
Sources
Also known as GHSA-443c-w3hv-6grh.