CVE-2021-46250: An issue in SOA2Login::commented of ScratchOAuth2 before commit a91879bd58fa83b09283c0708a1864cdf067c64a allow

Q: How do I fix CVE-2021-46250?

scratchoauth2: upgrade to 2021-04-13. Exact commands for each OS are on this page.

Q: Is CVE-2021-46250 being exploited?

CVE-2021-46250 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-2021-46250 affect?

CVE-2021-46250 affects scratchoauth2. Severity is critical (CVSS 10.0). An issue in SOA2Login::commented of ScratchOAuth2 before commit a91879bd58fa83b09283c0708a1864cdf067c64a allows attackers to authenticate as other users on downstream components that rely on ScratchOAuth2.

Q: How urgent is CVE-2021-46250?

Priority 56/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 10.0REMOTEUPGRADE

CVE-2021-46250 is a critical-severity flaw (CVSS 10.0) affecting scratchoauth2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue in SOA2Login::commented of ScratchOAuth2 before commit a91879bd58fa83b09283c0708a1864cdf067c64a allows attackers to authenticate as other users on downstream components that rely on ScratchOAuth2.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 36%)
CISA exploited list	No
Published	2022-02-15
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: scratchoauth2 project

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

Am I affected?

Timeline

2022-02-15 23:15 UTCPublished CVE record published
2026-06-17 04:14 UTCUpdated Record last modified

scratchoauth2 project scratchoauth2 UPGRADE

Affected: < 2021-04-13

Fixed in: 2021-04-13

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy scratchoauth2 || rpm -q scratchoauth2 || scratchoauth2 --version

2. UPGRADE to 2021-04-13 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade scratchoauth2

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade scratchoauth2

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-2021-46250?

scratchoauth2: upgrade to 2021-04-13. Exact commands for each OS are on this page.

Is CVE-2021-46250 being exploited?

CVE-2021-46250 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-2021-46250 affect?

CVE-2021-46250 affects scratchoauth2. Severity is critical (CVSS 10.0). An issue in SOA2Login::commented of ScratchOAuth2 before commit a91879bd58fa83b09283c0708a1864cdf067c64a allows attackers to authenticate as other users on downstream components that rely on ScratchOAuth2.

How urgent is CVE-2021-46250?

Priority 56/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2021-46251 MEDIUM 6.1 UPGRADE A reflected cross-site scripting (XSS) in ScratchOAuth2 before commit 1603f04e44ef67dde6ccffe866d2dca16defb293
CVE-2021-46249 MEDIUM 6.5 UPGRADE An authorization bypass exploited by a user-controlled key in SpecificApps REST API in ScratchOAuth2 before co
CVE-2021-29437 HIGH 8.0 UPGRADE ScratchOAuth2 is an Oauth implementation for Scratch

References

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