What is CVE-2025-53532?

CVE-2025-53532 is a medium-severity vulnerability in Giscus, classified under Improper Authorization. CVSS score: 5.3/10. Published 2025-07-07.

How severe is CVE-2025-53532?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Giscus

CVE-2025-53532

giscus is a commenting system powered by GitHub Discussions. A bug in giscus' discussions creation API allowed an unauthorized user to create discussions on any repository where giscus is installed. This affects the server-side part of gis…

EPSS: 0.003 (17.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Giscus — versions < c43af7806e65adfcf4d0feeebef76dc36c95cb9a

Weakness classification (CWE)

CWE-285 — Improper Authorization

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-53532?: CVE-2025-53532 is a medium-severity vulnerability in Giscus, classified under Improper Authorization. CVSS score: 5.3/10. Published 2025-07-07.
How severe is CVE-2025-53532?: Medium severity. CVSS v3 base score is 5.3 out of 10.