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CVE-2015-4657: Cross-site scripting (XSS) vulnerability in Mailbird 2.0.16.0 and earlier allows remote attackers to inject ar

32
Routine
MEDIUM 4.3UPGRADE

CVE-2015-4657 is a medium-severity flaw (CVSS 4.3) affecting mailbird. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in Mailbird 2.0.16.0 and earlier allows remote attackers to inject arbitrary web script or HTML via an e-mail message body with a crafted URL.

Why this priority

  • No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score4.3 (Medium)
EPSS exploit chance1.1% (top 33%)
CISA exploited listNo
WeaknessCWE-79
Published2015-06-18
Last modified2026-06-17
Publisher (CNA): MITRE · Vendor: mailbird

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

Am I affected?

Timeline

mailbird mailbird UPGRADE
Affected: <= 2.0.16.0
Fixed in: newer than 2.0.16.0
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy mailbird || rpm -q mailbird || mailbird --version
2. UPGRADE to newer than 2.0.16.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade mailbird
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade mailbird
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-2015-4657?

mailbird: upgrade to newer than 2.0.16.0. Exact commands for each OS are on this page.

Is CVE-2015-4657 being exploited?

CVE-2015-4657 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-2015-4657 affect?

CVE-2015-4657 affects mailbird. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) vulnerability in Mailbird 2.0.16.0 and earlier allows remote attackers to inject arbitrary web script or HTML via an e-mail message body with a crafted URL.

How urgent is CVE-2015-4657?

Priority 32/100. No elevated risk signals yet.

Related CVEs

References

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