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Fencer Vulns
medium 6.1

CVE-2019-13038 json

mod_auth_mellon through 0.14.2 has an Open Redirect via the login?ReturnTo= substring, as demonstrated by omitting the // after http: in th…

published 2019-06-29 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-4603

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.4%
EPSS 1.4% chance of exploitation in 30 days, percentile 73%
public exploits
0
none known

Summary

mod_auth_mellon through 0.14.2 has an Open Redirect via the login?ReturnTo= substring, as demonstrated by omitting the // after http: in the target URL.

Patch / fix

  • libapache2-mod-auth-mellon Debian 14, Debian 13, Debian 12 0.15.0-1

debian advisories DEBIAN-CVE-2019-13038

  • libapache2-mod-auth-mellon Ubuntu 18.04 LTS 0.13.1-1ubuntu0.2
  • libapache2-mod-auth-mellon Ubuntu 20.04 LTS 0.14.2-1ubuntu2

ubuntu advisories UBUNTU-CVE-2019-13038

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • mod_auth_mellon RHEL 8 0.14.0-11.el8
  • mod_auth_mellon-diagnostics RHEL 8 0.14.0-11.el8
  • mod_auth_mellon RHEL 7 0.14.0-8.el7
  • mod_auth_mellon-diagnostics RHEL 7 0.14.0-8.el7

red hat advisories RHSA-2020:1660RHSA-2020:1003

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-13038 updated cvss 6.1

mod_auth_mellon: Open Redirect via the login?ReturnTo= substring which could facilitate information theft

  • Red Hat Enterprise Linux 6 mod_auth_mellon
    affected: no fix planned “Out of support scope”
  • Red Hat Software Collections httpd24-mod_auth_mellon
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 8) mod_auth_mellon 0.14.0-11.el8, mod_auth_mellon-diagnostics 0.14.0-11.el8
    fixed: vendor fix RHSA-2020:1660
  • Red Hat Enterprise Linux Server (v. 7) mod_auth_mellon 0.14.0-8.el7, mod_auth_mellon-diagnostics 0.14.0-8.el7 Red Hat Enterprise Linux Workstation (v. 7) mod_auth_mellon 0.14.0-8.el7, mod_auth_mellon-diagnostics 0.14.0-8.el7
    fixed: vendor fix RHSA-2020:1003

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.42% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-601 URL Redirection to Untrusted Site

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.