CVE-2020-26885: An issue was discovered in 2sic 2sxc before 11.22

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MEDIUM 6.1UPGRADE

CVE-2020-26885 is a medium-severity flaw (CVSS 6.1) affecting 2sxc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in 2sic 2sxc before 11.22. A XSS vulnerability in the sxcver parameter of dnn/ui.html allows an attacker to craft a malicious URL that executes a JavaScript payload in a victim's browser.

Why this priority

Public exploit reference

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	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-06-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: 2sic

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

Am I affected?

Timeline

2021-06-07 04:15 UTCPublished CVE record published
2026-06-17 03:08 UTCUpdated Record last modified

2sic 2sxc UPGRADE

Affected: >= 8.00.00 and < 11.22.00

Fixed in: 11.22.00

Safe to downgrade to: a release before 8.00.00

1. Check installed version

apt-cache policy 2sxc || rpm -q 2sxc || 2sxc --version

2. UPGRADE to 11.22.00 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade 2sxc

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade 2sxc

Note

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

3. If no update is available yet, DOWNGRADE to a release before 8.00.00 (Debian / Ubuntu)

apt-cache madison 2sxc sudo apt install 2sxc=<VERSION_BEFORE_8.00.00> sudo apt-mark hold 2sxc

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list 2sxc sudo dnf downgrade 2sxc-<VERSION_BEFORE_8.00.00> sudo dnf versionlock add 2sxc

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-2020-26885?

2sxc: upgrade to 11.22.00. Exact commands for each OS are on this page.

Is CVE-2020-26885 being exploited?

CVE-2020-26885 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-2020-26885 affect?

CVE-2020-26885 affects 2sxc. Severity is medium (CVSS 6.1). An issue was discovered in 2sic 2sxc before 11.22. A XSS vulnerability in the sxcver parameter of dnn/ui.html allows an attacker to craft a malicious URL that executes a JavaScript payload in a victim's browser.

How urgent is CVE-2020-26885?

Priority 43/100. Public exploit reference

References

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