CVE-2021-30185 Indico Tampering with links (e.g. password reset) in sent emails
High 7.5
Published
Updated
Check this codebase for CVE-2021-30185 and fix it if it is affected.
What it is: CVE-2021-30185 is a high-severity vulnerability in n/a, published on 7 Apr 2021. 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-2021-30185 in the wild and no public exploit code.
Affected packages and fixed versions:
- indico (PyPI): affected all versions; fixed in 2.3.4
- indico (PyPI): affected all versions; fixed in 2.3.4
- indico (PyPI): affected all versions; fixed in 2.3.4
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-2021-30185/ (Markdown: https://insights.sbomify.com/CVE-2021-30185/index.md)
Attackers can manipulate the Host header in password reset links to redirect users to malicious sites, potentially leading to account takeover.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-30185?
CVE-2021-30185 is a high-severity vulnerability in n/a, published on 7 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
CERN Indico before 2.3.4 can use an attacker-supplied Host header in a password reset link.
Which versions are affected by CVE-2021-30185?
3 open source packages ship an affected version, including indico. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
indico PyPI | All versions | 2.3.4 |
indico PyPI | All versions | 2.3.4 |
indico PyPI | All versions | 2.3.4 |
Products include Cern Indico.
How do I fix CVE-2021-30185?
Upgrade indico to 2.3.4 or later.
Is CVE-2021-30185 being exploited?
There is no known exploitation of CVE-2021-30185 in the wild and no public exploit code.
Other vulnerabilities in n/a
- CVE-2026-33046 Indico discloses local files resulting in Remote Code Execution through LaTeX injection
- CVE-2026-25738 Indico has Server-Side Request Forgery (SSRF) in multiple places
- CVE-2026-28352 Indico missing access check in event series management API
- CVE-2026-25739 Indico affected by Cross-Site-Scripting via material uploads
- CVE-2023-37901 Cross-Site-Scripting via confirmation prompts
Sources
Also known as GHSA-wgpj-7c2j-vfjm, PYSEC-2021-18.