Plack::Middleware::Session versions before 0.17 for Perl may be vulnerable to HMAC comparison timing attacks
Published Dec 9, 2025
7.5
HIGHCVSS 3.1
EPSS 0.29%
Description
Plack-Middleware-Session versions before 0.17 may be vulnerable to HMAC comparison timing attacks
Affected products
-
- Version 0.01StatusaffectedConstraints<0.17
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Miyagawa | Plack::Middleware::Session | unaffected |
|
- < 0.17
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Vendor solution
Upgrade to version 0.17 or higher
Red Hat statement
This vulnerability is rated Important for Red Hat products that use Plack::Middleware::Session. A timing attack on HMAC comparison could allow an attacker to infer sensitive information, potentially leading to session hijacking. Successful exploitation requires the ability to accurately measure response times, which may be challenging in typical network environments.
Red Hat mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Dec 9, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2025–2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.29% (0.00291) | 19.72th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.24% (0.00245) | 15.44th | v5 (v2026.06.15) |
| Dec 9, 2025 | 0.02% (0.00018) | 3.99th | v4 (v2025.03.14) |
References (5)
- https://access.redhat.com/security/cve/CVE-2013-10031 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2420282 Issue Tracking
- https://github.com/plack/Plack-Middleware-Session/commit/b7f0252269ba1bb812b5dc02303754fe94c808e4 patch
- https://nvd.nist.gov/vuln/detail/CVE-2013-10031
- https://www.cve.org/CVERecord?id=CVE-2013-10031
Change history (0)
No recorded changes yet.