CVE-2021-3150: A cross-site scripting (XSS) vulnerability on the Delete Personal Data page in Cryptshare Server before 4.8.0

Q: How do I fix CVE-2021-3150?

cryptshare server: upgrade to 4.8.0. Exact commands for each OS are on this page.

Q: Is CVE-2021-3150 being exploited?

CVE-2021-3150 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-2021-3150 affect?

CVE-2021-3150 affects cryptshare server. Severity is medium (CVSS 6.1). A cross-site scripting (XSS) vulnerability on the Delete Personal Data page in Cryptshare Server before 4.8.0 allows an attacker to inject arbitrary web script or HTML via the user name. The issue is fixed with the version 4.8.1

Q: How urgent is CVE-2021-3150?

Priority 34/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2021-3150 is a medium-severity flaw (CVSS 6.1) affecting cryptshare server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A cross-site scripting (XSS) vulnerability on the Delete Personal Data page in Cryptshare Server before 4.8.0 allows an attacker to inject arbitrary web script or HTML via the user name. The issue is fixed with the version 4.8.1

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

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 49%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-03-15
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cryptshare

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

Am I affected?

Timeline

2021-03-15 19:15 UTCPublished CVE record published
2026-06-17 04:04 UTCUpdated Record last modified

cryptshare cryptshare server UPGRADE

Affected: < 4.8.0

Fixed in: 4.8.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cryptshare-server || rpm -q cryptshare-server || cryptshare-server --version

2. UPGRADE to 4.8.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cryptshare-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cryptshare-server

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-2021-3150?

cryptshare server: upgrade to 4.8.0. Exact commands for each OS are on this page.

Is CVE-2021-3150 being exploited?

CVE-2021-3150 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-2021-3150 affect?

CVE-2021-3150 affects cryptshare server. Severity is medium (CVSS 6.1). A cross-site scripting (XSS) vulnerability on the Delete Personal Data page in Cryptshare Server before 4.8.0 allows an attacker to inject arbitrary web script or HTML via the user name. The issue is fixed with the version 4.8.1

How urgent is CVE-2021-3150?

Priority 34/100. No elevated risk signals yet.

Related CVEs

CVE-2021-42564 MEDIUM 5.4 UPGRADE An open redirect through HTML injection in confidential messages in Cryptshare before 5.1.0 allows remote atta

References

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