How severe is CVE-2013-10031?

CVE-2013-10031 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2013-10031 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-10031?

CVE-2013-10031 affects Plack Plack-middleware-session. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2013-10031?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2013-10031 have an EU (EUVD) identifier?

Yes. CVE-2013-10031 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2013-7289.

When was CVE-2013-10031 published?

CVE-2013-10031 was published on 2025-12-09 and last updated on 2026-06-16.

CVE-2013-10031

CVE-2013-10031 is a high-severity vulnerability in Plack Plack-middleware-session with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1254.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2013-7289
Weakness: CWE-1254
Affected product: Plack Plack-middleware-session
Published: 2025-12-09
Last modified: 2026-06-16

Description

Plack-Middleware-Session versions before 0.17 may be vulnerable to HMAC comparison timing attacks

Frequently asked questions

What is CVE-2013-10031?: Plack-Middleware-Session versions before 0.17 may be vulnerable to HMAC comparison timing attacks
How severe is CVE-2013-10031?: CVE-2013-10031 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2013-10031 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-10031?: CVE-2013-10031 affects Plack Plack-middleware-session. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2013-10031?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2013-10031 have an EU (EUVD) identifier?: Yes. CVE-2013-10031 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2013-7289.
When was CVE-2013-10031 published?: CVE-2013-10031 was published on 2025-12-09 and last updated on 2026-06-16.

References

https://github.com/plack/Plack-Middleware-Session/commit/b7f0252269ba1bb812b5dc02303754fe94c808e4

Affected products (1)

cpe:2.3:a:plack:plack-middleware-session:*:*:*:*:*:*:*:*

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