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Fencer Intel
medium 5.4

CVE-2017-16807 json

Kirby XSS Vulnerability

published 2017-11-13 8 y ago modified 2026-06-17 4 mo ago also GHSA-275c-v3rc-xghx , EUVD-2022-1926

cvss
5.4
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.4%
EPSS 2.4% chance of exploitation in 30 days, percentile 84%
public exploits
1
Exploit-DB

Summary

A cross-site Scripting (XSS) vulnerability in Kirby Panel before 2.3.3, 2.4.x before 2.4.2, and 2.5.x before 2.5.7 exists when displaying a specially prepared SVG document that has been uploaded as a content file.

Patch / fix

  • packagist getkirby/cms 2.3.3, 2.4.2, 2.5.7
  • getkirby panel 2.3.3, 2.4.2, 2.5.7

Timeline

  1. First public exploit (EDB-43140)
  2. Published

Exploit prediction

2.42% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-43140 Kirby CMS < 2.5.7 - Cross-Site Scripting webapps, 2017-11-13
  • packetstormsecurity.com https://packetstormsecurity.com/files/144965/KirbyCMS-Cross-Site-Scripting.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 5.4 CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N
GitHub 3.0 5.4 CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
packagist getkirby/cms
<2.3.3
>=2.4, <2.4.2
>=2.5, <2.5.7
2.3.3
2.4.2
2.5.7

Classification

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

References

Sources

Fencer Intel 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.