CVE-2021-391914.7MediumCWE-601

CVE-2021-39191: URL Redirection to Untrusted Site ('Open Redirect') in mod_auth_openidc

zmartzone · mod_auth_openidc

Vendor fix available · Affected: zmartzone mod_auth_openidc · Exploitation: possible (1 to 10%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

1.7%probability of exploitation in the next 30 days

78th percentile

050100

Higher than 78% of scored CVEs

4.7MediumCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an OpenID Connect Relying Party, authenticating users against an OpenID Connect Provider. In versions prior to 2.4.9.4, the 3rd-party init SSO functionality of mod_auth_openidc was reported to be vulnerable to an open redirect attack by supplying a crafted URL in the `target_link_uri` parameter. A patch in version 2.4.9.4 made it so that the `OIDCRedirectURLsAllowed` setting must be applied to the `target_link_uri` parameter. There are no known workarounds aside from upgrading to a patched version.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

zmartzone · mod_auth_openidc<=2.4.9.3

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Possible (1 to 10%). EPSS between 1% and 10%.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Open Redirect
Vendor: zmartzone
Published: September 2021
Band: Possible (1 to 10%), September 2021

CoverageNo articles yet

No CyberSIXT article names CVE-2021-39191 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.