Vulnerability · Published Jul 7, 2025 · Assigned by GitHub_M

CVE-2025-53532giscus allows unauthorized discussion creation

Medium 5.3

In plain English

A medium-severity security flaw in giscus from giscus. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.3%top 75.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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 giscus, which is provided via http://giscus.app or your own self-hosted service. This vulnerability is fixed by the c43af7806e65adfcf4d0feeebef76dc36c95cb9a and 4b9745fe1a326ce08d69f8a388331bc993d19389 commits.

Affected products (as reported)

Vendor	Product	Versions
giscus	giscus	< c43af7806e65adfcf4d0feeebef76dc36c95cb9a

Weakness: CWE-285 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References

https://github.com/giscus/giscus/security/advisories/GHSA-w6vg-v24f-4vm3 x_refsource_CONFIRM
https://github.com/giscus/giscus/commit/4b9745fe1a326ce08d69f8a388331bc993d19389 x_refsource_MISC
https://github.com/giscus/giscus/commit/c43af7806e65adfcf4d0feeebef76dc36c95cb9a x_refsource_MISC