What is CVE-2024-25191?

CVE-2024-25191 is a critical-severity vulnerability in Zihanggao Php-Jwt, classified under Observable Discrepancy. CVSS score: 9.8/10. Published 2024-02-08.

How severe is CVE-2024-25191?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Zihanggao Php-Jwt

CVE-2024-25191

php-jwt 1.0.0 uses strcmp (which is not constant time) to verify authentication, which makes it easier to bypass authentication via a timing side channel.

Published 2024-02-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (57.9th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Zihanggao Php-Jwt — versions 1.0.0

Weakness classification (CWE)

CWE-203 — Observable Discrepancy

References

github.com/P3ngu1nW/CVE_Request/blob/main/cdoco:php-jwt.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2024-25191?: CVE-2024-25191 is a critical-severity vulnerability in Zihanggao Php-Jwt, classified under Observable Discrepancy. CVSS score: 9.8/10. Published 2024-02-08.
How severe is CVE-2024-25191?: Critical severity. CVSS v3 base score is 9.8 out of 10.