CVE-2021-45425: Reflected Cross Site Scripting (XSS) in SAFARI Montage versions 8.3 and 8.5 allows remote attackers to execute

This month

MEDIUM 6.1DOWNGRADE

CVE-2021-45425 is a medium-severity flaw (CVSS 6.1) affecting safari montage. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Reflected Cross Site Scripting (XSS) in SAFARI Montage versions 8.3 and 8.5 allows remote attackers to execute JavaScript codes.

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	3.4% (top 11%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-12-28
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: safarimontage

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

Am I affected?

Timeline

2021-12-28 13:15 UTCPublished CVE record published
2026-06-17 04:13 UTCUpdated Record last modified

safarimontage safari montage DOWNGRADE

Affected: 8.3 · 8.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.3

1. Check installed version

apt-cache policy safari-montage || rpm -q safari-montage || safari-montage --version

2. No fixed release: DOWNGRADE to a release before 8.3 (Debian / Ubuntu)

apt-cache madison safari-montage sudo apt install safari-montage=<VERSION_BEFORE_8.3> sudo apt-mark hold safari-montage

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

dnf --showduplicates list safari-montage sudo dnf downgrade safari-montage-<VERSION_BEFORE_8.3> sudo dnf versionlock add safari-montage

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: SAFARI Montage 8.5 - Reflected Cross Site Scripting (XSS)

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-2021-45425?

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

Is CVE-2021-45425 being exploited?

CVE-2021-45425 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-2021-45425 affect?

CVE-2021-45425 affects safari montage. Severity is medium (CVSS 6.1). Reflected Cross Site Scripting (XSS) in SAFARI Montage versions 8.3 and 8.5 allows remote attackers to execute JavaScript codes.

How urgent is CVE-2021-45425?

Priority 49/100. Public exploit reference

Software pages

Safari vulnerabilities · Apple Safari and WebKit vulnerabilities

Related CVEs

CVE-2021-45818 MEDIUM 6.1 DOWNGRADE SAFARI Montage 8.7.32 is affected by a CRLF injection vulnerability which can lead to HTTP response splitting.

References

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