CVE-2023-53890: Perch CMS 3.2 contains a stored cross-site scripting vulnerability that allows authenticated users to upload m

Routine

MEDIUM 5.4DOWNGRADE

CVE-2023-53890 is a medium-severity flaw (CVSS 5.4) affecting perch. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Perch CMS 3.2 contains a stored cross-site scripting vulnerability that allows authenticated users to upload malicious SVG files with embedded JavaScript. Attackers can craft SVG files with script tags that execute when the file is viewed, potentially stealing user session information or performing client-side attacks.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 85%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-12-15
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: grabaperch

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

Am I affected?

Timeline

2025-12-15 21:15 UTCPublished CVE record published
2026-06-17 06:46 UTCUpdated Record last modified

grabaperch perch DOWNGRADE

Affected: 3.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.2 (Debian / Ubuntu)

apt-cache madison perch sudo apt install perch=<VERSION_BEFORE_3.2> sudo apt-mark hold perch

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

dnf --showduplicates list perch sudo dnf downgrade perch-<VERSION_BEFORE_3.2> sudo dnf versionlock add perch

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-2023-53890?

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

Is CVE-2023-53890 being exploited?

CVE-2023-53890 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-2023-53890 affect?

CVE-2023-53890 affects perch. Severity is medium (CVSS 5.4). Perch CMS 3.2 contains a stored cross-site scripting vulnerability that allows authenticated users to upload malicious SVG files with embedded JavaScript. Attackers can craft SVG files with script tags that execute when the file is viewed,

How urgent is CVE-2023-53890?

Priority 28/100. Public exploit reference

Related CVEs

CVE-2025-66686 MEDIUM 6.1 DOWNGRADE A stored Cross-Site Scripting (XSS) vulnerability exists in Perch CMS version 3.2
CVE-2023-53889 HIGH 7.2 DOWNGRADE Perch CMS 3.2 contains a remote code execution vulnerability that allows authenticated administrators to uploa

References

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