CVE-2013-10031 | Plack::Middleware::Session versions before 0.17 for Perl may be vulnerable to HMAC comparison timing attacks

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

Published: 2025-12-08 Last update: 2026-06-16 Assigner: 9b29abf9-4ab0-4765-b253-1875cd9b441e Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-10031 is rated Low Risk (35.6/100): CVSS High severity, with low exploitation likelihood (EPSS 0.24%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2013-10031

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.04% 0.24% +0.21%
2 2026-05-07 0.06% 0.04% -0.02%
3 2026-04-10 — 0.06% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-10031

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2013-10031

OS Trackers for CVE-2013-10031

vendor priority summary link
debian not yet assigned CVE-2013-10031 not yet assigned priority: Debian including 1 source packages (libplack-middleware-session-perl), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2013-10031
redhat high — https://access.redhat.com/security/cve/CVE-2013-10031
ubuntu medium CVE-2013-10031 medium priority: Ubuntu including 1 source packages (libplack-middleware-session-perl), 8 status rows across 8 suites (bionic, focal, jammy, noble, plucky, questing, upstream, xenial): not-affected 4, needs-triage 3, released 1. https://ubuntu.com/security/CVE-2013-10031

Affected software / configurations for CVE-2013-10031

Vendor Product Version Raw CPE
plack plack-middleware-session < 0.17 cpe:2.3:a:plack:plack-middleware-session:*:*:*:*:*:*:*:*

References for CVE-2013-10031

cvelogic Threat Intelligence