CVE-2020-16270: OLIMPOKS under 3.3.39 allows Auth/Admin ErrorMessage XSS

Q: How do I fix CVE-2020-16270?

olimpok: upgrade to 3.3.39. Exact commands for each OS are on this page.

Q: Is CVE-2020-16270 being exploited?

CVE-2020-16270 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-16270 affect?

CVE-2020-16270 affects olimpok. Severity is medium (CVSS 6.1). OLIMPOKS under 3.3.39 allows Auth/Admin ErrorMessage XSS. Remote Attacker can use discovered vulnerability to inject malicious JavaScript payload to victim’s browsers in context of vulnerable applications. Executed code can be used to steal

Q: How urgent is CVE-2020-16270?

Priority 45/100. EPSS top 4%: very likely to be exploited

This week

MEDIUM 6.1UPGRADE

CVE-2020-16270 is a medium-severity flaw (CVSS 6.1) affecting olimpok. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OLIMPOKS under 3.3.39 allows Auth/Admin ErrorMessage XSS. Remote Attacker can use discovered vulnerability to inject malicious JavaScript payload to victim’s browsers in context of vulnerable applications. Executed code can be used to steal administrator’s cookies, influence HTML content of targeted application and perform phishing-related attacks. Vulnerable application used in more than 3000 organizations in different sectors from retail to ind

Why this priority

EPSS top 4%: very likely to be exploited

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	13.1% (top 4%)
CISA exploited list	No
Weakness	CWE-79
Published	2020-10-16
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: olimpoks

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

Am I affected?

Timeline

2020-10-16 14:15 UTCPublished CVE record published
2026-06-17 02:57 UTCUpdated Record last modified

olimpoks olimpok UPGRADE

Affected: < 3.3.39

Fixed in: 3.3.39

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 3.3.39 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade olimpok

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade olimpok

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2020-16270?

olimpok: upgrade to 3.3.39. Exact commands for each OS are on this page.

Is CVE-2020-16270 being exploited?

CVE-2020-16270 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-2020-16270 affect?

CVE-2020-16270 affects olimpok. Severity is medium (CVSS 6.1). OLIMPOKS under 3.3.39 allows Auth/Admin ErrorMessage XSS. Remote Attacker can use discovered vulnerability to inject malicious JavaScript payload to victim’s browsers in context of vulnerable applications. Executed code can be used to steal

How urgent is CVE-2020-16270?

Priority 45/100. EPSS top 4%: very likely to be exploited

References

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