CVE-2021-41976: Tad Uploader edit book list function is vulnerable to authorization bypass, thus remote attackers can use the

Q: How do I fix CVE-2021-41976?

tad uploader: upgrade to 3.5.4. Exact commands for each OS are on this page.

Q: Is CVE-2021-41976 being exploited?

CVE-2021-41976 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-2021-41976 affect?

CVE-2021-41976 affects tad uploader. Severity is medium (CVSS 5.3). Tad Uploader edit book list function is vulnerable to authorization bypass, thus remote attackers can use the function to amend the folder names in the book list without logging in.

Q: How urgent is CVE-2021-41976?

Priority 39/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2021-41976 is a medium-severity flaw (CVSS 5.3) affecting tad uploader. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Tad Uploader edit book list function is vulnerable to authorization bypass, thus remote attackers can use the function to amend the folder names in the book list without logging in.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 36%)
CISA exploited list	No
Weakness	CWE-285, CWE-306
Published	2021-10-08
Last modified	2026-06-17

Publisher (CNA): TWCERT/CC · Vendor: tad uploader project

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

Am I affected?

Timeline

2021-10-08 16:15 UTCPublished CVE record published
2026-06-17 04:09 UTCUpdated Record last modified

tad uploader project tad uploader UPGRADE

Affected: < 3.5.4

Fixed in: 3.5.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy tad-uploader || rpm -q tad-uploader || tad-uploader --version

2. UPGRADE to 3.5.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade tad-uploader

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tad-uploader

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-2021-41976?

tad uploader: upgrade to 3.5.4. Exact commands for each OS are on this page.

Is CVE-2021-41976 being exploited?

CVE-2021-41976 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-2021-41976 affect?

CVE-2021-41976 affects tad uploader. Severity is medium (CVSS 5.3). Tad Uploader edit book list function is vulnerable to authorization bypass, thus remote attackers can use the function to amend the folder names in the book list without logging in.

How urgent is CVE-2021-41976?

Priority 39/100. Remotely exploitable, no login, no user action

Related CVEs

CVE-2021-41567 MEDIUM 6.1 UPGRADE The new add subject parameter of Tad Uploader view book list function fails to filter special characters

References

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