SAML Single Sign On – SSO Login: known security problems
14 known security problems reported for this WordPress plugin, with the affected versions, the fix and what to do.
Updated
In short
There are 14 known security problems on this page. Each one has a fixed version. Updating to version 20.0.7 or newer covers every fixed problem listed here.
Based on public reports. Check the plugin’s changelog. Watchfox AI may be wrong.
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A stranger could take over your site as an admin (up to and including 5.4.7)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 5.4.7
- Fixed in
- 6.0.0
- What to do
- If your site has an affected version, update SAML Single Sign On – SSO Login to version 6.0.0 or newer.
- Official ID
- CVE-2026-82842
- Report title
- SAML Single Sign On <= 5.4.7 - Unauthenticated Privilege Escalation
- First reported
- Sources
- Wordfence, seen
A stranger could take over your site as an admin (up to and including 5.4.6)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 5.4.6
- Fixed in
- 5.4.7
- What to do
- If your site has an affected version, update SAML Single Sign On – SSO Login to version 5.4.7 or newer.
- Official ID
- CVE-2026-75807
- Report title
- SAML Single Sign On <= 5.4.6 - Unauthenticated Authentication Bypass via X.509 Certificate Poisoning
- First reported
- Sources
- Wordfence, seen
A stranger could take over your site as an admin (from 4.8.85 up to and including 5.4.6)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- From 4.8.85 up to and including 5.4.6
- Fixed in
- 5.4.7
- What to do
- If your site has an affected version, update SAML Single Sign On – SSO Login to version 5.4.7 or newer.
- Official ID
- CVE-2026-19842
- Report title
- SAML Single Sign On – SSO Login 4.8.85-5.4.6 - Unauthenticated Privilege Escalation
- First reported
- Sources
- Wordfence, seen
A stranger could take over your site as an admin (up to and including 5.4.3)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 5.4.3
- Fixed in
- 5.4.4
- What to do
- If your site has an affected version, update SAML Single Sign On – SSO Login to version 5.4.4 or newer.
- Official ID
- CVE-2026-61979
- Report title
- SAML Single Sign On – SSO Login <= 5.4.3 - Unauthenticated Privilege Escalation
- First reported
- Sources
- Wordfence, seen
A stranger could take over your site as an admin (up to and including 5.4.4)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 5.4.4
- Fixed in
- 5.4.5
- What to do
- If your site has an affected version, update SAML Single Sign On – SSO Login to version 5.4.5 or newer.
- Official ID
- CVE-2026-15981
- Report title
- SAML Single Sign On <= 5.4.4 - Unauthenticated Authentication Bypass via SAMLResponse Parameter
- First reported
- Sources
- Wordfence, seen
A stranger could take over your site as an admin (up to and including 5.4.3) (2)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 5.4.3
- Fixed in
- 5.4.4
- What to do
- If your site has an affected version, update SAML Single Sign On – SSO Login to version 5.4.4 or newer.
- Official ID
- CVE-2026-15013
- Report title
- SAML Single Sign On <= 5.4.3 - Unauthenticated Authentication Bypass via 'SAMLResponse' Parameter Signature Algorithm Confusion
- First reported
- Sources
- Wordfence, seen
Someone could do things on your site they should not be allowed to
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 5.0.4
- Fixed in
- 5.0.5
- What to do
- If your site has an affected version, update SAML Single Sign On – SSO Login to version 5.0.5 or newer.
- Official ID
- CVE-2023-41873
- Report title
- SAML SP Single Sign On <= 5.0.4 - Missing Authorization to notice dismissal
- First reported
- Sources
- Wordfence, seen
Someone could send your visitors from your site to a harmful site (from 16 up to, but not including, 16.0.8)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- From 16 up to, but not including, 16.0.8
- Fixed in
- 16.0.8
- What to do
- If your site has an affected version, update SAML Single Sign On – SSO Login to version 16.0.8 or newer.
- Official ID
- CVE-2022-4496
- Report title
- SAML Single Sign On – SSO Login Premium Multisite < 20.0.7 - Open Redirect
- First reported
- Sources
- Wordfence, seen
Someone could send your visitors from your site to a harmful site (from 12 up to, but not including, 12.1.0)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- From 12 up to, but not including, 12.1.0
- Fixed in
- 12.1.0
- What to do
- If your site has an affected version, update SAML Single Sign On – SSO Login to version 12.1.0 or newer.
- Official ID
- CVE-2022-4496
- Report title
- SAML Single Sign On – SSO Login Premium Multisite < 20.0.7 - Open Redirect
- First reported
- Sources
- Wordfence, seen
Someone could send your visitors from your site to a harmful site (from 20 up to, but not including, 20.0.7)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- From 20 up to, but not including, 20.0.7
- Fixed in
- 20.0.7
- What to do
- If your site has an affected version, update SAML Single Sign On – SSO Login to version 20.0.7 or newer.
- Official ID
- CVE-2022-4496
- Report title
- SAML Single Sign On – SSO Login Premium Multisite < 20.0.7 - Open Redirect
- First reported
- Sources
- Wordfence, seen
Someone could plant harmful code that runs for your visitors or admins (up to and including 4.9.20)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 4.9.20
- Fixed in
- 4.9.21
- What to do
- If your site has an affected version, update SAML Single Sign On – SSO Login to version 4.9.21 or newer.
- Report title
- SAML Single Sign On – SAML SSO Login <= 4.9.20 - Reflected Cross-Site Scripting
- First reported
- Sources
- Wordfence, seen
Someone could plant harmful code that runs for your visitors or admins (up to and including 4.8.83)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 4.8.83
- Fixed in
- 4.8.84
- What to do
- If your site has an affected version, update SAML Single Sign On – SSO Login to version 4.8.84 or newer.
- Official ID
- CVE-2020-6850
- Report title
- SAML Single Sign On – SAML SSO Login <= 4.8.83 - Cross-Site Scripting
- First reported
- Sources
- Wordfence, seen
Someone could plant harmful code that runs for your visitors or admins (before 4.8.73)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Before 4.8.73
- Fixed in
- 4.8.73
- What to do
- If your site has an affected version, update SAML Single Sign On – SSO Login to version 4.8.73 or newer.
- Official ID
- CVE-2019-12346
- Report title
- SAML Single Sign On – SAML SSO Login < 4.8.73 - Cross-Site Scripting
- First reported
- Sources
- Wordfence, seen
Someone could trick a logged-in admin into changing settings without knowing
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 4.8.75
- Fixed in
- 4.8.76
- What to do
- If your site has an affected version, update SAML Single Sign On – SSO Login to version 4.8.76 or newer.
- Report title
- SAML Single Sign On – SAML SSO Login <= 4.8.75 - Cross-Site Request Forgery
- First reported
- Sources
- Wordfence, seen
Where this comes from
We collect these reports from public security sources and rewrite them in plain words. Each problem shows its sources and the date we first saw it. This page never says whether your own site is affected: only a check of your site’s versions can tell.
Get an email when your site is affected.
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