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CVE-2023-48379: Softnext Mail SQR Expert is an email management platform, it has inadequate filtering for a specific URL param

36
Routine
MEDIUM 5.3REMOTEUPGRADE

CVE-2023-48379 is a medium-severity flaw (CVSS 5.3) affecting mail sqr expert. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Softnext Mail SQR Expert is an email management platform, it has inadequate filtering for a specific URL parameter within a specific function. An unauthenticated remote attacker can perform Blind SSRF attack to discover internal network topology base on URL error response.

Why this priority

  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score5.3 (Medium)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.6% (top 52%)
CISA exploited listNo
WeaknessCWE-918
Published2023-12-15
Last modified2026-06-17
Publisher (CNA): TWCERT/CC · Vendor: softnext

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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

softnext mail sqr expert UPGRADE
Affected: <= 230330
Fixed in: newer than 230330
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy mail-sqr-expert || rpm -q mail-sqr-expert || mail-sqr-expert --version
2. UPGRADE to newer than 230330 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade mail-sqr-expert
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade mail-sqr-expert
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-2023-48379?

mail sqr expert: upgrade to newer than 230330. Exact commands for each OS are on this page.

Is CVE-2023-48379 being exploited?

CVE-2023-48379 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-2023-48379 affect?

CVE-2023-48379 affects mail sqr expert. Severity is medium (CVSS 5.3). Softnext Mail SQR Expert is an email management platform, it has inadequate filtering for a specific URL parameter within a specific function. An unauthenticated remote attacker can perform Blind SSRF attack to discover internal network top

How urgent is CVE-2023-48379?

Priority 36/100. Remotely exploitable, no login, no user action

Related CVEs

References

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