What is CVE-2021-45818?

CVE-2021-45818 is a medium-severity vulnerability in Safarimontage Safari Montage, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.1/10. Published 2021-12-30.

How severe is CVE-2021-45818?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Vulnerability in Safarimontage Safari Montage

CVE-2021-45818

SAFARI Montage 8.7.32 is affected by a CRLF injection vulnerability which can lead to HTTP response splitting.

Published 2021-12-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (48.8th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Safarimontage Safari Montage — versions 8.7.32

Weakness classification (CWE)

CWE-74 — Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection)

References

drive.google.com/file/d/19_O6Sfc0PvgEZD7m98a5heNNOp28ZfcE/view (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-45818?: CVE-2021-45818 is a medium-severity vulnerability in Safarimontage Safari Montage, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.1/10. Published 2021-12-30.
How severe is CVE-2021-45818?: Medium severity. CVSS v3 base score is 6.1 out of 10.