CVE-2023-23277: Snippet-box 1.0.0 is vulnerable to Cross Site Scripting (XSS)

Routine

MEDIUM 6.1DOWNGRADE

CVE-2023-23277 is a medium-severity flaw (CVSS 6.1) affecting snippet box. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Snippet-box 1.0.0 is vulnerable to Cross Site Scripting (XSS). Remote attackers can render arbitrary web script or HTML from the "Snippet code" form field.

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	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-04-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: snippet box project

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

Am I affected?

Timeline

2023-04-11 15:15 UTCPublished CVE record published
2026-06-17 05:36 UTCUpdated Record last modified

snippet box project snippet box DOWNGRADE

Affected: 1.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.0

1. Check installed version

apt-cache policy snippet-box || rpm -q snippet-box || snippet-box --version

2. No fixed release: DOWNGRADE to a release before 1.0.0 (Debian / Ubuntu)

apt-cache madison snippet-box sudo apt install snippet-box=<VERSION_BEFORE_1.0.0> sudo apt-mark hold snippet-box

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

dnf --showduplicates list snippet-box sudo dnf downgrade snippet-box-<VERSION_BEFORE_1.0.0> sudo dnf versionlock add snippet-box

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-2023-23277?

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

Is CVE-2023-23277 being exploited?

CVE-2023-23277 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-2023-23277 affect?

CVE-2023-23277 affects snippet box. Severity is medium (CVSS 6.1). Snippet-box 1.0.0 is vulnerable to Cross Site Scripting (XSS). Remote attackers can render arbitrary web script or HTML from the "Snippet code" form field.

How urgent is CVE-2023-23277?

Priority 39/100. Public exploit reference

References

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