CVE-2013-10031 Plack::Middleware::Session versions before 0.17 for Perl may be vulnerable to HMAC comparison timing attacks
High 7.5
Published
Updated
Check this codebase for CVE-2013-10031 and fix it if it is affected.
What it is: CVE-2013-10031 is a high-severity vulnerability in MIYAGAWA Plack::Middleware::Session, published on 9 Dec 2025. 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-2013-10031 in the wild and no public exploit code.
Affected product: MIYAGAWA Plack::Middleware::Session. 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-2013-10031/ (Markdown: https://insights.sbomify.com/CVE-2013-10031/index.md)
Attackers can exploit timing side-channels in HMAC comparisons to bypass session integrity checks in Plack::Middleware::Session.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2013-10031?
CVE-2013-10031 is a high-severity vulnerability in MIYAGAWA Plack::Middleware::Session, published on 9 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Plack-Middleware-Session versions before 0.17 may be vulnerable to HMAC comparison timing attacks
Weakness: CWE-1254
Which versions are affected by CVE-2013-10031?
It affects 1 product.
Products include Plack Plack-Middleware-Session.
How do I fix CVE-2013-10031?
Upgrade to a fixed version.
Is CVE-2013-10031 being exploited?
There is no known exploitation of CVE-2013-10031 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2013-10031, GHSA-rvh4-4hm5-gx4x, UBUNTU-CVE-2013-10031.