CVE-2021-43970: An arbitrary file upload vulnerability exists in albumimages.jsp in Quicklert for Digium 10.0.0 (1043) via a .

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HIGH 8.8DOWNGRADE

CVE-2021-43970 is a high-severity flaw (CVSS 8.8) affecting quicklert. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An arbitrary file upload vulnerability exists in albumimages.jsp in Quicklert for Digium 10.0.0 (1043) via a .mp3;.jsp filename for a file that begins with audio data bytes. It allows an authenticated (low privileged) attacker to execute remote code on the target server within the context of application's permissions (SYSTEM).

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.8% (top 22%)
CISA exploited list	No
Weakness	CWE-434
Published	2022-03-10
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: quicklert

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-03-10 17:44 UTCPublished CVE record published
2026-06-17 04:11 UTCUpdated Record last modified

quicklert quicklert DOWNGRADE

Affected: 10.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0.0

1. Check installed version

apt-cache policy quicklert || rpm -q quicklert || quicklert --version

2. No fixed release: DOWNGRADE to a release before 10.0.0 (Debian / Ubuntu)

apt-cache madison quicklert sudo apt install quicklert=<VERSION_BEFORE_10.0.0> sudo apt-mark hold quicklert

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list quicklert sudo dnf downgrade quicklert-<VERSION_BEFORE_10.0.0> sudo dnf versionlock add quicklert

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-43970?

quicklert: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-43970 being exploited?

CVE-2021-43970 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-43970 affect?

CVE-2021-43970 affects quicklert. Severity is high (CVSS 8.8). An arbitrary file upload vulnerability exists in albumimages.jsp in Quicklert for Digium 10.0.0 (1043) via a .mp3;.jsp filename for a file that begins with audio data bytes. It allows an authenticated (low privileged) attacker to execute re

How urgent is CVE-2021-43970?

Priority 55/100. High severity; Public exploit reference

Related CVEs

CVE-2021-43969 MEDIUM 6.5 DOWNGRADE The login.jsp page of Quicklert for Digium 10.0.0 (1043) is affected by both Blind SQL Injection with Out-of-B

References

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