CVE-2021-29028: A cross-site scripting (XSS) vulnerability in Bitweaver version 3.1.0 allows remote attackers to inject JavaSc

Routine

MEDIUM 4.8DOWNGRADE

CVE-2021-29028 is a medium-severity flaw (CVSS 4.8) affecting bitweaver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A cross-site scripting (XSS) vulnerability in Bitweaver version 3.1.0 allows remote attackers to inject JavaScript via the /users/admin/user_activity.php URI.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-03-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: bitweaver

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

Am I affected?

Timeline

2021-03-24 13:15 UTCPublished CVE record published
2026-06-17 03:47 UTCUpdated Record last modified

bitweaver bitweaver DOWNGRADE

Affected: 3.1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.1.0

1. Check installed version

apt-cache policy bitweaver || rpm -q bitweaver || bitweaver --version

2. No fixed release: DOWNGRADE to a release before 3.1.0 (Debian / Ubuntu)

apt-cache madison bitweaver sudo apt install bitweaver=<VERSION_BEFORE_3.1.0> sudo apt-mark hold bitweaver

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

dnf --showduplicates list bitweaver sudo dnf downgrade bitweaver-<VERSION_BEFORE_3.1.0> sudo dnf versionlock add bitweaver

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-2021-29028?

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

Is CVE-2021-29028 being exploited?

CVE-2021-29028 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-2021-29028 affect?

CVE-2021-29028 affects bitweaver. Severity is medium (CVSS 4.8). A cross-site scripting (XSS) vulnerability in Bitweaver version 3.1.0 allows remote attackers to inject JavaScript via the /users/admin/user_activity.php URI.

How urgent is CVE-2021-29028?

Priority 36/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2021-29033 MEDIUM 4.8 DOWNGRADE A cross-site scripting (XSS) vulnerability in Bitweaver version 3.1.0 allows remote attackers to inject JavaSc
CVE-2021-29032 MEDIUM 4.8 DOWNGRADE A cross-site scripting (XSS) vulnerability in Bitweaver version 3.1.0 allows remote attackers to inject JavaSc
CVE-2021-29031 MEDIUM 4.8 DOWNGRADE A cross-site scripting (XSS) vulnerability in Bitweaver version 3.1.0 allows remote attackers to inject JavaSc
CVE-2021-29030 MEDIUM 4.8 DOWNGRADE A cross-site scripting (XSS) vulnerability in Bitweaver version 3.1.0 allows remote attackers to inject JavaSc
CVE-2021-29029 MEDIUM 4.8 DOWNGRADE A cross-site scripting (XSS) vulnerability in Bitweaver version 3.1.0 allows remote attackers to inject JavaSc

References

← Back to latest CVEs