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CVE-2021-33054

SOGo 2.x before 2.4.1 and 3.x through 5.x before 5.1.1 does not validate the signatures of any...

7.5 HighFix available

SOGo 2.x before 2.4.1 and 3.x through 5.x before 5.1.1 does not validate the signatures of any SAML assertions it receives. Any actor with network access to the deployment could impersonate users when SAML is the authentication method. (Only versions after 2.0.5a are affected.)

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
High
Availability
None

Exploit likelihood

1.00%Up 0.2 points since Jun 5, 2021
90%50%10%1%

What each source reports

NVD Score used 7.5

SOGo 2.x before 2.4.1 and 3.x through 5.x before 5.1.1 does not validate the signatures of any SAML assertions it receives. Any actor with network access to the deployment could impersonate users when SAML is the authentication method. (Only versions after 2.0.5a are affected.)

Record
CVE-2021-33054
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:P/A:N
Weakness
CWE-347
Updated
2026-11-02
CVE List No score

SOGo 2.x before 2.4.1 and 3.x through 5.x before 5.1.1 does not validate the signatures of any SAML assertions it receives. Any actor with network access to the deployment could impersonate users when SAML is the authentication method. (Only versions after 2.0.5a are affected.)

Record
CVE-2021-33054
Updated
2026-11-02
EUVDEUVD-2021-19769 No score

SOGo 2.x before 2.4.1 and 3.x through 5.x before 5.1.1 does not validate the signatures of any SAML assertions it receives. Any actor with network access to the deployment could impersonate users when SAML is the authentication method. (Only versions after 2.0.5a are affected.)

Record
EUVD-2021-19769
Updated
2026-11-03
GitHub AdvisoriesGHSA-5x58-gqg4-wfvq 7.5

SOGo 2.x before 2.4.1 and 3.x through 5.x before 5.1.1 does not validate the signatures of any...

SOGo 2.x before 2.4.1 and 3.x through 5.x before 5.1.1 does not validate the signatures of any SAML assertions it receives. Any actor with network access to the deployment could impersonate users when SAML is the authentication method. (Only versions after 2.0.5a are affected.)

Record
GHSA-5x58-gqg4-wfvq
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness
CWE-347
Updated
2026-11-02
OSV 7.5

SOGo 2.x before 2.4.1 and 3.x through 5.x before 5.1.1 does not validate the signatures of any SAML assertions it receives. Any actor with network access to the deployment could impersonate users when SAML is the authentication method. (Only versions after 2.0.5a are affected.)

Record
CVE-2021-33054
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Updated
2026-11-02
OSVDEBIAN-CVE-2021-33054 7.5

SOGo 2.x before 2.4.1 and 3.x through 5.x before 5.1.1 does not validate the signatures of any SAML assertions it receives. Any actor with network access to the deployment could impersonate users when SAML is the authentication method. (Only versions after 2.0.5a are affected.)

Record
DEBIAN-CVE-2021-33054
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2021-33054 7.5

SOGo 2.x before 2.4.1 and 3.x through 5.x before 5.1.1 does not validate the signatures of any SAML assertions it receives. Any actor with network access to the deployment could impersonate users when SAML is the authentication method. (Only versions after 2.0.5a are affected.)

Record
UBUNTU-CVE-2021-33054
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Updated
2026-11-02
OSVMGASA-2022-0481 No score

Updated sogo packages fix security vulnerability

Missing SAML signature validation in the SOGo groupware could result in impersonation attacks. (CVE-2021-33054)

Record
MGASA-2022-0481
Updated
2026-11-02
OSVUSN-8504-1 No score

sogo vulnerabilities

It was discovered that SOGo did not properly sanitize categories used for events, tasks, and contacts. A remote authenticated attacker could possibly use this issue to perform cross-site scripting attacks. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 26.04 LTS. (CVE-2025-71276)

It was discovered that SOGo did not properly sanitize the hint query parameter. A remote attacker could possibly use this issue to perform cross-site scripting attacks. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-3054)

It was discovered that SOGo did not renew the one-time password when a user disabled and re-enabled it, and used a shorter length than recommended. A remote attacker could possibly use this issue to bypass authentication. This issue only affected Ubuntu 22.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-33550)

It was discovered that SOGo did not properly use the SQL adaptor for the user source, resulting in SQL injection when certain databases were used. A remote authenticated attacker could possibly use this issue to obtain sensitive information or execute arbitrary SQL commands. (CVE-2026-46445, CVE-2026-46446)

It was discovered that SOGo did not properly sanitize mail containing ICS calendar invitations. A remote attacker could possibly use this issue to perform cross-site scripting attacks. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-8496)

It was discovered that SOGo did not properly validate identifiers when managing access control lists. A remote authenticated attacker could possibly use this issue to perform SQL injection attacks and obtain sensitive information. (CVE-2026-8851)

It was discovered that SOGo did not properly sanitize the theme parameter. A remote attacker could possibly use this issue to perform cross-site scripting attacks. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS. (CVE-2025-63499)

It was discovered that SOGo did not properly sanitize the userName parameter on the login page. A remote attacker could possibly use this issue to perform cross-site scripting attacks. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS. (CVE-2025-63498)

It was discovered that SOGo did not properly sanitize attachments when previewing them. A remote attacker could possibly use this issue to perform cross-site scripting attacks. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS. (CVE-2024-34462)

It was discovered that SOGo did not validate the signatures of SAML assertions it received when SAML was used for authentication. A remote attacker could possibly use this issue to impersonate other users. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2021-33054)

Record
USN-8504-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
sogo
Debian:12
before 5.1.1-1
5.1.1-1
sogo
Debian:13
before 5.1.1-1
5.1.1-1
sogo
Debian:9
before 3.2.6-2+deb9u1, plus listed versions
3.2.6-2
3.2.6-2+deb9u1
sogo
Debian:10
before 4.0.7-1+deb10u2, plus listed versions
4.0.7-14.0.7-1+deb10u1
4.0.7-1+deb10u2
sogo
Debian:11
before 5.0.1-4+deb11u1, plus listed versions
5.0.1-4
5.0.1-4+deb11u1
sogo
Mageia:8
before 5.6.0-1.mga8
5.6.0-1.mga8
sope
Mageia:8
before 5.6.0-1.1.mga8
5.6.0-1.1.mga8
sogo
Ubuntu:Pro:16.04:LTS
before 2.2.17a-1.1ubuntu0.1~esm1, plus listed versions
2.2.17a-12.2.17a-1.12.2.17a-1.1build1
2.2.17a-1.1ubuntu0.1~esm1
sogo
Ubuntu:Pro:18.04:LTS
before 3.2.10-1ubuntu0.1~esm1, plus listed versions
3.2.10-13.2.10-1build1
3.2.10-1ubuntu0.1~esm1
sogo
Ubuntu:Pro:20.04:LTS
before 4.3.0-1ubuntu0.1~esm1, plus listed versions
4.0.8-14.1.0-14.1.1-14.3.0-1
4.3.0-1ubuntu0.1~esm1
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Affected packages
PackageAffectedFixed
sogo
Ubuntu:Pro:16.04:LTS
From an advisory covering 11 CVEs
before 2.2.17a-1.1ubuntu0.1~esm1, plus listed versions
2.2.17a-12.2.17a-1.12.2.17a-1.1build1
2.2.17a-1.1ubuntu0.1~esm1
sogo
Ubuntu:Pro:18.04:LTS
From an advisory covering 11 CVEs
before 3.2.10-1ubuntu0.1~esm1, plus listed versions
3.2.10-13.2.10-1build1
3.2.10-1ubuntu0.1~esm1
sogo
Ubuntu:Pro:20.04:LTS
From an advisory covering 11 CVEs
before 4.3.0-1ubuntu0.1~esm1, plus listed versions
4.0.8-14.1.0-14.1.1-14.3.0-1
4.3.0-1ubuntu0.1~esm1
sogo
Ubuntu:Pro:22.04:LTS
From an advisory covering 11 CVEs
before 5.5.1-1ubuntu0.1~esm1, plus listed versions
5.1.0-15.2.0-15.2.0-35.3.0-15.3.0-1build25.4.0-15.5.0-15.5.1-1
5.5.1-1ubuntu0.1~esm1
sogo
Ubuntu:Pro:26.04:LTS
From an advisory covering 11 CVEs
before 5.12.4-1.2ubuntu0.1~esm1, plus listed versions
5.12.1-35.12.4-15.12.4-1.15.12.4-1.2
5.12.4-1.2ubuntu0.1~esm1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-33054 is a high vulnerability (CVSS 7.5) in Inverse Sogo, published June 4, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.00%, the 62nd percentile. Fixed in sogo 5.1.1-1.

References

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