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Fencer Vulns
high 8.8

CVE-2024-38521 json

Persistent Cross-Site Scripting (XSS) in hushline inbox

published 2024-06-28 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-37390

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits
0
none known

Summary

Hush Line is a free and open-source, anonymous-tip-line-as-a-service for organizations or individuals. There is a stored XSS in the Inbox. The input is displayed using the `safe` Jinja2 attribute, and thus not sanitized upon display. This issue has been patched in version 0.1.0.

Patch / fix

  • scidsg hushline 0.1.0

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/scidsg/hushline/security/advisories/GHSA-4v8c-r6h2-fhh3 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

  • scidsg hushline

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.