CVE-2023-2259 — Improper Neutralization of Special Elements Used in a Template Engine in GitHub

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

01What is this vulnerability?

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

02Affected products

Vendor	Product	Versions
alfio-event	alfio	event/alf.io — unspecified

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-04-24T00:00:00.000Z
• Last modified: 2025-02-04T16:49:08.353Z

09References

• huntr.dev — https://huntr.dev/bounties/e753bce0-ce82-463b-b344-2f67b39b60ff
• github.com — https://github.com/alfio-event/alf.io/commit/94e2923a317452e337393789c9f3192dfc1…