CVE-2020-36932: SeaCMS 11.1 contains a stored cross-site scripting vulnerability in the checkuser parameter of the admin setti

Routine

MEDIUM 6.1DOWNGRADE

CVE-2020-36932 is a medium-severity flaw (CVSS 6.1) affecting seacms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SeaCMS 11.1 contains a stored cross-site scripting vulnerability in the checkuser parameter of the admin settings page. Attackers can inject malicious JavaScript payloads that will execute in users' browsers when the page is loaded.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 80%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-01-25
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: seacms

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

Am I affected?

Timeline

2026-01-25 13:15 UTCPublished CVE record published
2026-06-17 03:16 UTCUpdated Record last modified

seacms seacms DOWNGRADE

Affected: 11.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 11.1 (Debian / Ubuntu)

apt-cache madison seacms sudo apt install seacms=<VERSION_BEFORE_11.1> sudo apt-mark hold seacms

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

dnf --showduplicates list seacms sudo dnf downgrade seacms-<VERSION_BEFORE_11.1> sudo dnf versionlock add seacms

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-2020-36932?

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

Is CVE-2020-36932 being exploited?

CVE-2020-36932 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-2020-36932 affect?

CVE-2020-36932 affects seacms. Severity is medium (CVSS 6.1). SeaCMS 11.1 contains a stored cross-site scripting vulnerability in the checkuser parameter of the admin settings page. Attackers can inject malicious JavaScript payloads that will execute in users' browsers when the page is loaded.

How urgent is CVE-2020-36932?

Priority 31/100. Public exploit reference

Related CVEs

CVE-2025-15003 MEDIUM 4.7 UPGRADE A vulnerability was found in SeaCMS up to 13.3
CVE-2025-10662 MEDIUM 4.7 UPGRADE A vulnerability has been found in SeaCMS up to 13.3
CVE-2025-11071 MEDIUM 4.7 DOWNGRADE A security vulnerability has been detected in SeaCMS 13.3.20250820
CVE-2023-50470 MEDIUM 5.4 DOWNGRADE A cross-site scripting (XSS) vulnerability in the component admin_ Video.php of SeaCMS v12.8 allows attackers
CVE-2023-46987 HIGH 8.8 DOWNGRADE SeaCMS v12.9 was discovered to contain a remote code execution (RCE) vulnerability via the component /augap/ad

References

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