CVE-2020-9056: Periscope BuySpeed version 14.5 is vulnerable to stored cross-site scripting, which could allow a local, authe

Routine

LOW 3.9DOWNGRADE

CVE-2020-9056 is a low-severity flaw (CVSS 3.9) affecting buyspeed. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Periscope BuySpeed version 14.5 is vulnerable to stored cross-site scripting, which could allow a local, authenticated attacker to store arbitrary JavaScript within the application. This JavaScript is subsequently displayed by the application without sanitization and is executed in the browser of the user, which could possibly cause website redirection, session hijacking, or information disclosure. This vulnerability has been patched in BuySpeed

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	0.6% (top 49%)
CISA exploited list	No
Weakness	CWE-79
Published	2020-04-10
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2020-04-10 19:15 UTCPublished CVE record published
2026-06-17 03:27 UTCUpdated Record last modified

periscopeholdings buyspeed DOWNGRADE

Affected: 14.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 14.5

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 14.5 (Debian / Ubuntu)

apt-cache madison buyspeed sudo apt install buyspeed=<VERSION_BEFORE_14.5> sudo apt-mark hold buyspeed

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

dnf --showduplicates list buyspeed sudo dnf downgrade buyspeed-<VERSION_BEFORE_14.5> sudo dnf versionlock add buyspeed

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-2020-9056?

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

Is CVE-2020-9056 being exploited?

CVE-2020-9056 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-2020-9056 affect?

CVE-2020-9056 affects buyspeed. Severity is low (CVSS 3.9). Periscope BuySpeed version 14.5 is vulnerable to stored cross-site scripting, which could allow a local, authenticated attacker to store arbitrary JavaScript within the application. This JavaScript is subsequently displayed by the applicati

How urgent is CVE-2020-9056?

Priority 26/100. No elevated risk signals yet.

References

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