Helpy version 2.8.0 allows an unauthenticated remote attacker to exploit an XSS stored in the application.

published 2023-04-04 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-12418

cvss: 6.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits: 0; none known

Helpy version 2.8.0 allows an unauthenticated remote attacker to exploit an XSS stored in the application. This is possible because the application does not correctly validate the attachments sent by customers in the ticket.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 20 mo ago (2025-02-13)

Exploit prediction

0.69% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

fluidattacks.com https://fluidattacks.com/advisories/quayle/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

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

n/a Helpy

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

fluidattacks.com /advisories/quayle/
exploit, third-party-advisory
github.com /helpyio/helpy/
product

Sources

CVE List CVE-2023-0357
NVD CVE-2023-0357

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.

Summary