Improper Neutralization of Special Elements Used in a Template Engine in alfio-event/alf.io

published 2023-04-24 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-33765

cvss: 9.1; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.1%; EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits: 0; none known

Improper Neutralization of Special Elements Used in a Template Engine in GitHub repository alfio-event/alf.io prior to 2.0-M4-2304.

Patch / fix

fixed in 1 links 1

alfio-event alfio-event/alf.io 2.0-M4-2304

github.com/alfio-event/alf.io@94e2923 commit

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: total
Assessed: 21 mo ago (2025-02-04)

Exploit prediction

1.09% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

huntr.dev https://huntr.dev/bounties/e753bce0-ce82-463b-b344-2f67b39b60ff referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.0	9.1	CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
NVD	3.1	7.2	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

alfio-event alfio-event/alf.io

Classification

Weakness

CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine
CWE-94 Improper Control of Generation of Code

References

github.com /alfio-event/alf.io/commit/94e2923a317452e337393789c9f3192dfc1ddac2
patch
huntr.dev /bounties/e753bce0-ce82-463b-b344-2f67b39b60ff
exploit, third-party-advisory

Sources

CVE List CVE-2023-2259
NVD CVE-2023-2259

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