CVE-2025-43931

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2025-07-07. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

flask-boilerplate through a170e7c allows account takeover via the password reset feature because SERVER_NAME is not configured and thus a reset depends on the Host HTTP header.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
26.6%
KEV
Not listed

Published

July 7, 2025

Last Modified

April 15, 2026

Advisory Details (2)

Auto-updated May 5, 2026
No patch confirmed yet.
generic

flask-boilerplate/app/views/user.py at a170e7cec605906801680567c4279b30ccd9630b · MaxHalford/flask-boilerplate · GitHub

https://github.com/MaxHalford/flask-boilerplate/blob/a170e7cec605906801680567c4279b30ccd9630b/app/views/user.py#L103-L126
generic

Security Advisory: Host Header Injection Leading to Password Reset Poisoning.md · GitHub

https://gist.github.com/BrookeYangRui/19fcc6c19df7bb4d8437476c609a6129

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 49× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 123 total refreshes for this CVE.

  1. 2026-07-23 02:56 UTCEG score recompute
  2. 2026-07-22 14:07 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2025-43931?
CVE-2025-43931 is a critical vulnerability published on July 7, 2025. flask-boilerplate through a170e7c allows account takeover via the password reset feature because SERVER_NAME is not configured and thus a reset depends on the Host HTTP header.
When was CVE-2025-43931 disclosed?
CVE-2025-43931 was first published in the National Vulnerability Database on July 7, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-43931 actively exploited?
CVE-2025-43931 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 26.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-43931?
CVE-2025-43931 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2025-43931?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-43931, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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