CVE-2011-5090: GR Board (aka grboard) 1.8.6.5 Community Edition does not require authentication for certain database actions,

This month

MEDIUM 6.4DOWNGRADE

CVE-2011-5090 is a medium-severity flaw (CVSS 6.4) affecting grboard. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

GR Board (aka grboard) 1.8.6.5 Community Edition does not require authentication for certain database actions, which allows remote attackers to modify or delete data via a request to (1) mod_rewrite.php, (2) comment_write_ok.php, (3) poll/index.php, (4) update/index.php, (5) trackback.php, or (6) an arbitrary poll.php script under theme/.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.4 (Medium)
EPSS exploit chance	1.3% (top 30%)
CISA exploited list	No
Weakness	CWE-287
Published	2012-05-24
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: grboard

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

Am I affected?

Timeline

2012-05-24 00:55 UTCPublished CVE record published
2026-06-16 23:35 UTCUpdated Record last modified

grboard grboard DOWNGRADE

Affected: 1.8.6.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.8.6.5

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.8.6.5 (Debian / Ubuntu)

apt-cache madison grboard sudo apt install grboard=<VERSION_BEFORE_1.8.6.5> sudo apt-mark hold grboard

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

dnf --showduplicates list grboard sudo dnf downgrade grboard-<VERSION_BEFORE_1.8.6.5> sudo dnf versionlock add grboard

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-2011-5090?

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

Is CVE-2011-5090 being exploited?

CVE-2011-5090 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-2011-5090 affect?

CVE-2011-5090 affects grboard. Severity is medium (CVSS 6.4). GR Board (aka grboard) 1.8.6.5 Community Edition does not require authentication for certain database actions, which allows remote attackers to modify or delete data via a request to (1) mod_rewrite.php, (2) comment_write_ok.php, (3) poll/i

How urgent is CVE-2011-5090?

Priority 45/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2011-5091 HIGH 7.5 DOWNGRADE Multiple SQL injection vulnerabilities in GR Board (aka grboard) 1.8.6.5 Community Edition allow remote attack
CVE-2009-0444 HIGH 7.5 DOWNGRADE Multiple PHP remote file inclusion vulnerabilities in GRBoard 1.8, when register_globals is enabled and magic_

References

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