CVE-2025-40923

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.33% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 25.6% of scored records. A rank, not a probability.

NVD base score

7.3 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

NVD analysis status

Deferred. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2025-07-16 13:05Z1 YR AGO

Last updated

2025-11-04 21:10Z10 MO AGO

Reserved

2025-04-16

Assigning CNA

CPANSec

Record state

PUBLISHED

Severity

High (CVSS 7.3)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Weaknesses

• CWE-338Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)Base
• CWE-340Generation of Predictable Numbers or IdentifiersClass

Data version

5.2

Document digest

5dc20a1ee5d191026935cd739bc233dd6fe969380cd8ae58a9cb751e1b69a743

• metacpan.orghttps://metacpan.org/release/MIYAGAWA/Plack-Middleware-Session-0.34/source/lib/Plack/Session/State.pm#L22
• github.comhttps://github.com/plack/Plack-Middleware-Session/pull/52
• github.comhttps://github.com/plack/Plack-Middleware-Session/commit/1fbfbb355e34e7f4b3906f66cf958cedadd2b9be.patchpatch
• security.metacpan.orghttps://security.metacpan.org/docs/guides/random-data-for-security.html
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/07/16/4