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CVE-2015-3175

Moodle Arbitrary Redirect

5.8 MediumFix available

Multiple open redirect vulnerabilities in Moodle through 2.5.9, 2.6.x before 2.6.11, 2.7.x before 2.7.8, and 2.8.x before 2.8.6 allow remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via vectors involving an error page that links to a URL from an HTTP Referer header.

Exploit likelihood

1.88%Up 0.7 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 5.8

Multiple open redirect vulnerabilities in Moodle through 2.5.9, 2.6.x before 2.6.11, 2.7.x before 2.7.8, and 2.8.x before 2.8.6 allow remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via vectors involving an error page that links to a URL from an HTTP Referer header.

Record
CVE-2015-3175
CVSS 2.0
5.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:N
Updated
2026-11-02
CVE List No score

Multiple open redirect vulnerabilities in Moodle through 2.5.9, 2.6.x before 2.6.11, 2.7.x before 2.7.8, and 2.8.x before 2.8.6 allow remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via vectors involving an error page that links to a URL from an HTTP Referer header.

Record
CVE-2015-3175
Updated
2026-11-02
EUVDEUVD-2022-4095 No score

Multiple open redirect vulnerabilities in Moodle through 2.5.9, 2.6.x before 2.6.11, 2.7.x before 2.7.8, and 2.8.x before 2.8.6 allow remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via vectors involving an error page that links to a URL from an HTTP Referer header.

Record
EUVD-2022-4095
Updated
2026-11-03
GitHub AdvisoriesGHSA-h798-h7ff-93xv No score

Moodle Arbitrary Redirect

Multiple open redirect vulnerabilities in Moodle through 2.5.9, 2.6.x before 2.6.11, 2.7.x before 2.7.8, and 2.8.x before 2.8.6 allow remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via vectors involving an error page that links to a URL from an HTTP Referer header.

Record
GHSA-h798-h7ff-93xv
Weakness
CWE-601
Updated
2026-11-02
OSVGHSA-h798-h7ff-93xv No score

Moodle Arbitrary Redirect

Multiple open redirect vulnerabilities in Moodle through 2.5.9, 2.6.x before 2.6.11, 2.7.x before 2.7.8, and 2.8.x before 2.8.6 allow remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via vectors involving an error page that links to a URL from an HTTP Referer header.

Record
GHSA-h798-h7ff-93xv
Weakness
CWE-601
Updated
2026-11-02
OSVMGASA-2015-0229 No score

Updated moodle packages fix security vulnerabilities

Updated moodle package fixes security vulnerabilities:

In Moodle before 2.6.11, leaving gradebook feedback is a trusted action and such capabilities in other modules already have an XSS mask, 'mod/quiz:grade' was missing this flag (CVE-2015-3174).

In Moodle before 2.6.11, some error messages display a button to return to the previous page. Redirecting to non-local referer should not be allowed as it can potentially be used for phising (CVE-2015-3175).

In Moodle before 2.6.11, on sites with enabled self-registration, not registered users can retrieve fullname of registered users if they know their usernames (CVE-2015-3176).

In Moodle before 2.6.11, if a user who is not XSS-trusted attempts to insert a script as part of the input text, it will be cleaned when displayed on the Moodle website but may be displayed uncleaned in the external application because external_format_text() cleans and formats text incorrectly when returning it from Web Services (CVE-2015-3178).

In Moodle before 2.6.11, when self-registration is enabled and a user's account was suspended after creating the account but before actually confirming it, the user is still able to login when confirming their email, but only once (CVE-2015-3179).

In Moodle before 2.6.11, if a user is enrolled in the course but his enrollment is suspended, they can not access the course but still were able to see the course structure in the navigation block (CVE-2015-3180).

In Moodle before 2.6.11, users with the revoked capability 'moodle/user:manageownfiles' are still able to upload private files using a deprecated function in Web Services (CVE-2015-3181).

Record
MGASA-2015-0229
Updated
2026-11-02
OSVUBUNTU-CVE-2015-3175 No score

Multiple open redirect vulnerabilities in Moodle through 2.5.9, 2.6.x before 2.6.11, 2.7.x before 2.7.8, and 2.8.x before 2.8.6 allow remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via vectors involving an error page that links to a URL from an HTTP Referer header.

Record
UBUNTU-CVE-2015-3175
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
moodle/moodle
Packagist
through 2.5.9 None known
moodle/moodle
Packagist
2.6.0 up to 2.6.11
2.6.11
moodle/moodle
Packagist
2.7.0 up to 2.7.8
2.7.8
moodle/moodle
Packagist
2.8.0 up to 2.8.6
2.8.6
moodle/moodle
Packagist
through 2.5.9, plus listed versions
v2.3.10v2.3.11v2.3.4v2.3.5v2.3.6
Show 28 moreShow less
v2.3.7v2.3.8v2.3.9v2.4.0v2.4.0-rc1v2.4.1v2.4.10v2.4.11v2.4.2v2.4.3v2.4.4v2.4.5v2.4.6v2.4.7v2.4.8v2.4.9v2.5.0v2.5.0-betav2.5.0-rc1v2.5.1v2.5.2v2.5.3v2.5.4v2.5.5v2.5.6v2.5.7v2.5.8v2.5.9
None known
moodle/moodle
Packagist
2.6.0 up to 2.6.11, plus listed versions
v2.6.0v2.6.1v2.6.10v2.6.2v2.6.3
Show 6 moreShow less
v2.6.4v2.6.5v2.6.6v2.6.7v2.6.8v2.6.9
2.6.11
moodle/moodle
Packagist
2.7.0 up to 2.7.8, plus listed versions
v2.7.0v2.7.1v2.7.2v2.7.3v2.7.4v2.7.5v2.7.6v2.7.7
2.7.8
moodle/moodle
Packagist
2.8.0 up to 2.8.6, plus listed versions
v2.8.0v2.8.1v2.8.2v2.8.3v2.8.4v2.8.5
2.8.6
moodle
Mageia:4
From an advisory covering 7 CVEs
before 2.6.11-1.mga4
2.6.11-1.mga4

History

History
RecordedChangedSources
affected, facts
affected
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2015-3175 is a medium vulnerability (CVSS 5.8) in Moodle, published May 18, 2015. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.88%, the 79th percentile. Fixed in moodle/moodle 2.6.11.

References

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