CVE-2020-7222: An issue was discovered in Amcrest Web Server 2.520.AC00.18.R 2017-06-29 WEB 3.2.1.453504

This week

MEDIUM 5.3REMOTEDOWNGRADE

CVE-2020-7222 is a medium-severity flaw (CVSS 5.3) affecting web server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Amcrest Web Server 2.520.AC00.18.R 2017-06-29 WEB 3.2.1.453504. The login page responds with JavaScript when one tries to authenticate. An attacker who changes the result parameter (to true) in this JavaScript code can bypass authentication and achieve limited privileges (ability to see every option but not modify them).

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.3% (top 30%)
CISA exploited list	No
Weakness	CWE-287
Published	2020-01-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: amcrest

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

Am I affected?

Timeline

2020-01-18 00:15 UTCPublished CVE record published
2026-06-17 03:24 UTCUpdated Record last modified

amcrest web server DOWNGRADE

Affected: 2.520.ac00.18.r

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.520.ac00.18.r

1. Check installed version

apt-cache policy web-server || rpm -q web-server || web-server --version

2. No fixed release: DOWNGRADE to a release before 2.520.ac00.18.r (Debian / Ubuntu)

apt-cache madison web-server sudo apt install web-server=<VERSION_BEFORE_2.520.ac00.18.r> sudo apt-mark hold web-server

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

dnf --showduplicates list web-server sudo dnf downgrade web-server-<VERSION_BEFORE_2.520.ac00.18.r> sudo dnf versionlock add web-server

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-2020-7222?

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

Is CVE-2020-7222 being exploited?

CVE-2020-7222 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-2020-7222 affect?

CVE-2020-7222 affects web server. Severity is medium (CVSS 5.3). An issue was discovered in Amcrest Web Server 2.520.AC00.18.R 2017-06-29 WEB 3.2.1.453504. The login page responds with JavaScript when one tries to authenticate. An attacker who changes the result parameter (to true) in this JavaScript cod

How urgent is CVE-2020-7222?

Priority 46/100. Public exploit reference; Remotely exploitable, no login, no user action

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CVE-2018-25235 MEDIUM 6.2 UPGRADE NetworkActiv Web Server 4.0 contains a buffer overflow vulnerability in the username field of the Security opt
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References

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