What is CVE-2021-35504?

CVE-2021-35504 is a high-severity vulnerability in Afian Filerun, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.2/10. Published 2021-10-05.

How severe is CVE-2021-35504?

High severity. CVSS v3 base score is 7.2 out of 10.

Is CVE-2021-35504 known to be exploited?

5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Afian Filerun

CVE-2021-35504

Afian FileRun 2021.03.26 allows Remote Code Execution (by administrators) via the Check Path value for the ffmpeg binary.

Published 2021-10-05 · last modified 2026-07-05.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.032 (87.6th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.032 · newest: 0.032 · change: 0.000

Affected products

Afian Filerun

Weakness classification (CWE)

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

Public proof-of-concept exploits

References

af854a3a-2127-422b-91ae-364da2661108 (Product)
syntegris-sec.github.io/filerun-advisory (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-35504?: CVE-2021-35504 is a high-severity vulnerability in Afian Filerun, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.2/10. Published 2021-10-05.
How severe is CVE-2021-35504?: High severity. CVSS v3 base score is 7.2 out of 10.
Is CVE-2021-35504 known to be exploited?: 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.