CVE-2008-1166: Flyspray 0.9.9.4 generates different error messages depending on whether the username is valid or invalid, whi

Routine

MEDIUM 5.0DOWNGRADE

CVE-2008-1166 is a medium-severity flaw (CVSS 5.0) affecting flyspray. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Flyspray 0.9.9.4 generates different error messages depending on whether the username is valid or invalid, which allows remote attackers to enumerate usernames.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-200
Published	2008-03-05
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: flyspray

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2008-03-05 23:44 UTCPublished CVE record published
2026-06-16 22:51 UTCUpdated Record last modified

flyspray flyspray DOWNGRADE

Affected: 0.9.9 · 0.9.9.1 · 0.9.9.2 · 0.9.9.3 · 0.9.9.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.9.9

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.9.9 (Debian / Ubuntu)

apt-cache madison flyspray sudo apt install flyspray=<VERSION_BEFORE_0.9.9> sudo apt-mark hold flyspray

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list flyspray sudo dnf downgrade flyspray-<VERSION_BEFORE_0.9.9> sudo dnf versionlock add flyspray

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2008-1166?

flyspray: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2008-1166 being exploited?

CVE-2008-1166 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-2008-1166 affect?

CVE-2008-1166 affects flyspray. Severity is medium (CVSS 5.0). Flyspray 0.9.9.4 generates different error messages depending on whether the username is valid or invalid, which allows remote attackers to enumerate usernames.

How urgent is CVE-2008-1166?

Priority 35/100. No elevated risk signals yet.

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References

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