How severe is CVE-2009-0853?

CVE-2009-0853 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2009-0853 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0853?

CVE-2009-0853 affects Stewart Howe Celerbb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-0853?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-0853 published?

CVE-2009-0853 was published on 2009-03-09 and last updated on 2026-06-16.

CVE-2009-0853

CVE-2009-0853 is a medium-severity vulnerability in Stewart Howe Celerbb with a CVSS 2.0 base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Stewart Howe Celerbb
Published: 2009-03-09
Last modified: 2026-06-16

Description

login.php in CelerBB 0.0.2, when magic_quotes_gpc is disabled, allows remote attackers to bypass authentication and obtain administrative access via special characters in the Username parameter, as demonstrated by an admin'# parameter value.

Frequently asked questions

What is CVE-2009-0853?: login.php in CelerBB 0.0.2, when magic_quotes_gpc is disabled, allows remote attackers to bypass authentication and obtain administrative access via special characters in the Username parameter, as demonstrated by an admin'# parameter value.
How severe is CVE-2009-0853?: CVE-2009-0853 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2009-0853 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0853?: CVE-2009-0853 affects Stewart Howe Celerbb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-0853?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-0853 published?: CVE-2009-0853 was published on 2009-03-09 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:stewart_howe:celerbb:0.0.2:*:*:*:*:*:*:*

More vulnerabilities in Stewart Howe Celerbb

CVE-2009-0851 — Medium (CVSS 6.8): Multiple SQL injection vulnerabilities in CelerBB 0.0.2, when magic_quotes_gpc is disabled, allow remote attackers to…
CVE-2009-0852 — Medium (CVSS 5.0): showme.php in CelerBB 0.0.2 allows remote attackers to obtain "reserved information" via the user parameter.

All CVEs affecting Stewart Howe Celerbb →

Other CWE-287 (Improper Authentication) vulnerabilities

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CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

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