CVE-2020-9055: Versiant LYNX Customer Service Portal (CSP), version 3.5.2, is vulnerable to stored cross-site scripting, whic

Routine

LOW 3.9DOWNGRADE

CVE-2020-9055 is a low-severity flaw (CVSS 3.9) affecting lynx customer service portal. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Versiant LYNX Customer Service Portal (CSP), version 3.5.2, is vulnerable to stored cross-site scripting, which could allow a local, authenticated attacker to insert malicious JavaScript that is stored and displayed to the end user. This could lead to website redirects, session cookie hijacking, or information disclosure.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	3.9 (Low)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-79
Published	2020-03-30
Last modified	2026-06-17

Publisher (CNA): CERT/CC · Vendor: versiant

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

Am I affected?

Timeline

2020-03-30 22:15 UTCPublished CVE record published
2026-06-17 03:27 UTCUpdated Record last modified

versiant lynx customer service portal DOWNGRADE

Affected: 3.5.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.5.2

1. Check installed version

apt-cache policy lynx-customer-service-portal || rpm -q lynx-customer-service-portal || lynx-customer-service-portal --version

2. No fixed release: DOWNGRADE to a release before 3.5.2 (Debian / Ubuntu)

apt-cache madison lynx-customer-service-portal sudo apt install lynx-customer-service-portal=<VERSION_BEFORE_3.5.2> sudo apt-mark hold lynx-customer-service-portal

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

dnf --showduplicates list lynx-customer-service-portal sudo dnf downgrade lynx-customer-service-portal-<VERSION_BEFORE_3.5.2> sudo dnf versionlock add lynx-customer-service-portal

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-2020-9055?

lynx customer service portal: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-9055 being exploited?

CVE-2020-9055 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-2020-9055 affect?

CVE-2020-9055 affects lynx customer service portal. Severity is low (CVSS 3.9). Versiant LYNX Customer Service Portal (CSP), version 3.5.2, is vulnerable to stored cross-site scripting, which could allow a local, authenticated attacker to insert malicious JavaScript that is stored and displayed to the end user. This co

How urgent is CVE-2020-9055?

Priority 25/100. No elevated risk signals yet.

References

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