CVE-2023-51374: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in ZeroBoun

Q: How do I fix CVE-2023-51374?

zerobounce email verification \& validation: upgrade to newer than 1.0.11. Exact commands for each OS are on this page.

Q: Is CVE-2023-51374 being exploited?

CVE-2023-51374 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-51374 affect?

CVE-2023-51374 affects zerobounce email verification \& validation. Severity is medium (CVSS 5.9). Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in ZeroBounce ZeroBounce Email Verification & Validation allows Stored XSS.This issue affects ZeroBounce Email Verification & Validation: fro

Q: How urgent is CVE-2023-51374?

Priority 27/100. No elevated risk signals yet.

Routine

MEDIUM 5.9UPGRADE

CVE-2023-51374 is a medium-severity flaw (CVSS 5.9) affecting zerobounce email verification \& validation. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in ZeroBounce ZeroBounce Email Verification & Validation allows Stored XSS.This issue affects ZeroBounce Email Verification & Validation: from n/a through 1.0.11.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.3% (top 74%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-12-29
Last modified	2026-06-17

Publisher (CNA): Patchstack · Vendor: zerobounce

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

Am I affected?

Timeline

2023-12-29 11:15 UTCPublished CVE record published
2026-06-17 06:40 UTCUpdated Record last modified

zerobounce zerobounce email verification \& validation UPGRADE

Affected: <= 1.0.11

Fixed in: newer than 1.0.11

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy zerobounce-email-verification--validation || rpm -q zerobounce-email-verification--validation || zerobounce-email-verification--validation --version

2. UPGRADE to newer than 1.0.11 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade zerobounce-email-verification--validation

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade zerobounce-email-verification--validation

Note

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

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-2023-51374?

zerobounce email verification \& validation: upgrade to newer than 1.0.11. Exact commands for each OS are on this page.

Is CVE-2023-51374 being exploited?

CVE-2023-51374 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-2023-51374 affect?

CVE-2023-51374 affects zerobounce email verification \& validation. Severity is medium (CVSS 5.9). Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in ZeroBounce ZeroBounce Email Verification & Validation allows Stored XSS.This issue affects ZeroBounce Email Verification & Validation: fro

How urgent is CVE-2023-51374?

Priority 27/100. No elevated risk signals yet.

References

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