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CVE-2024-21658

15
FAUCET Score

CVE-2024-21658 is a medium-severity vulnerability affecting the discourse-calendar plugin for Discourse, allowing a malicious actor to exploit an overly generous region value length limit. This can lead to excessive bandwidth and disk space consumption on a Discourse instance. The vulnerability has a CVSS score of 4.3 (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L), indicating it can be exploited remotely with low complexity and requires low privileges, resulting in a low impact on availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2024-08-28CPE matchmatch criteria
cpe:2.3:a:discourse:discourse_calendar:*:*:*:*:*:discourse:*:*

CVSS Data

CVSS version used by this source: 3.1

4.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.36%
Probability of exploitation in next 30 days
EPSS Percentile
28.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0036 is in the 38th percentile among its peer group of 21,977 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

github_advisoryvendor investigatingvia nvd_reference
View patch

References

github.com / discourse/discourse-calendar/security/advisories/GHSA-65f2-9ghp-x8h8
Vendor Advisory