CVE-2019-18223: ZOOM International Call Recording 6.3.1 suffers from multiple authenticated stored XSS vulnerabilities via the

Routine

MEDIUM 5.4DOWNGRADE

CVE-2019-18223 is a medium-severity flaw (CVSS 5.4) affecting call recording. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ZOOM International Call Recording 6.3.1 suffers from multiple authenticated stored XSS vulnerabilities via the phoneNumber field in the (1) User Edit or (2) User Add form, (3) name field in the Role Add form, (4) name or number field in the Edit Group form, (5) tagKey or tagValue field in the Recording Rules Configuration, or (6) txt_69735:/VemailAddress/value or txt_75767:/VemailFrom/value field in callrec/config.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.6% (top 53%)
CISA exploited list	No
Weakness	CWE-79
Published	2020-04-27
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: eleveo

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

Am I affected?

Timeline

2020-04-27 13:15 UTCPublished CVE record published
2026-06-17 02:24 UTCUpdated Record last modified

eleveo call recording DOWNGRADE

Affected: 6.3.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.3.1

1. Check installed version

apt-cache policy call-recording || rpm -q call-recording || call-recording --version

2. No fixed release: DOWNGRADE to a release before 6.3.1 (Debian / Ubuntu)

apt-cache madison call-recording sudo apt install call-recording=<VERSION_BEFORE_6.3.1> sudo apt-mark hold call-recording

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

dnf --showduplicates list call-recording sudo dnf downgrade call-recording-<VERSION_BEFORE_6.3.1> sudo dnf versionlock add call-recording

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-2019-18223?

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

Is CVE-2019-18223 being exploited?

CVE-2019-18223 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-2019-18223 affect?

CVE-2019-18223 affects call recording. Severity is medium (CVSS 5.4). ZOOM International Call Recording 6.3.1 suffers from multiple authenticated stored XSS vulnerabilities via the phoneNumber field in the (1) User Edit or (2) User Add form, (3) name field in the Role Add form, (4) name or number field in the

How urgent is CVE-2019-18223?

Priority 36/100. Public exploit reference

Software pages

Zoom vulnerabilities

Related CVEs

CVE-2019-18822 HIGH 8.8 DOWNGRADE A privilege escalation vulnerability in ZOOM Call Recording 6.3.1 allows its user account (i.e., the account u

References

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