CVE-2011-3821: xajax 0.6 beta1 allows remote attackers to obtain sensitive information via a direct request to a .php file, w

Routine

MEDIUM 5.0DOWNGRADE

CVE-2011-3821 is a medium-severity flaw (CVSS 5.0) affecting xajax. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

xajax 0.6 beta1 allows remote attackers to obtain sensitive information via a direct request to a .php file, which reveals the installation path in an error message, as demonstrated by xajax_core/plugin_layer/xajaxScriptPlugin.inc.php and certain other files.

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	1.3% (top 30%)
CISA exploited list	No
Weakness	CWE-200
Published	2011-09-24
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: xajax-project

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

Am I affected?

Timeline

2011-09-24 00:55 UTCPublished CVE record published
2026-06-16 23:33 UTCUpdated Record last modified

xajax-project xajax DOWNGRADE

Affected: 0.6 beta1

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.6

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.6 (Debian / Ubuntu)

apt-cache madison xajax sudo apt install xajax=<VERSION_BEFORE_0.6> sudo apt-mark hold xajax

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

dnf --showduplicates list xajax sudo dnf downgrade xajax-<VERSION_BEFORE_0.6> sudo dnf versionlock add xajax

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-2011-3821?

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

Is CVE-2011-3821 being exploited?

CVE-2011-3821 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-2011-3821 affect?

CVE-2011-3821 affects xajax. Severity is medium (CVSS 5.0). xajax 0.6 beta1 allows remote attackers to obtain sensitive information via a direct request to a .php file, which reveals the installation path in an error message, as demonstrated by xajax_core/plugin_layer/xajaxScriptPlugin.inc.php and c

How urgent is CVE-2011-3821?

Priority 35/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

Related CVEs

CVE-2007-2740 MEDIUM 6.8 UPGRADE Unspecified vulnerability in xajax before 0.2.5 has unknown impact and attack vectors, not related to XSS.
CVE-2007-2739 MEDIUM 4.3 UPGRADE Cross-site scripting (XSS) vulnerability in xajax before 0.2.5 allows remote attackers to inject arbitrary web

References

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