CVE-2019-11187: Incorrect Access Control in the LDAP class of GONICUS GOsa through 2019-04-11 allows an attacker to log into a

Q: How do I fix CVE-2019-11187?

gosa: upgrade to newer than 2019-04-11; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2019-11187 being exploited?

CVE-2019-11187 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-2019-11187 affect?

CVE-2019-11187 affects gosa, debian linux. Severity is critical (CVSS 9.8). Incorrect Access Control in the LDAP class of GONICUS GOsa through 2019-04-11 allows an attacker to log into any account with a username containing the case-insensitive substring "success" when an arbitrary password is provided.

Q: How urgent is CVE-2019-11187?

Priority 64/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

This week

CRITICAL 9.8REMOTEWATCHLISTUPGRADEMITIGATE

CVE-2019-11187 is a critical-severity flaw (CVSS 9.8) affecting gosa, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Incorrect Access Control in the LDAP class of GONICUS GOsa through 2019-04-11 allows an attacker to log into any account with a username containing the case-insensitive substring "success" when an arbitrary password is provided.

Why this priority

Critical severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.7% (top 22%)
CISA exploited list	No
Weakness	CWE-287
Published	2019-08-15
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: debian · gonicus

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

Am I affected?

Timeline

2019-08-15 17:15 UTCPublished CVE record published
2026-06-17 02:12 UTCUpdated Record last modified

gonicus gosa UPGRADE

Affected: <= 2019-04-11

Fixed in: newer than 2019-04-11

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 2019-04-11 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade gosa

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

debian debian linux MITIGATE

Affected: 8.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2019-11187?

gosa: upgrade to newer than 2019-04-11; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-11187 being exploited?

CVE-2019-11187 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-2019-11187 affect?

CVE-2019-11187 affects gosa, debian linux. Severity is critical (CVSS 9.8). Incorrect Access Control in the LDAP class of GONICUS GOsa through 2019-04-11 allows an attacker to log into any account with a username containing the case-insensitive substring "success" when an arbitrary password is provided.

How urgent is CVE-2019-11187?

Priority 64/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Debian vulnerabilities

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References

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