CVE-2025-13473 | Username enumeration through timing difference in mod_wsgi authentication handler

An issue was discovered in 6.0 before 6.0.2, 5.2 before 5.2.11, and 4.2 before 4.2.28. The `django.contrib.auth.handlers.modwsgi.check_password()` function for authentication via `mod_wsgi` allows remote attackers to enumerate users via a timing attack. Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected. Django would like to thank Stackered for reporting this issue.

Published: 2026-02-03 Last update: 2026-02-04 Assigner: 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92 Source: 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92

Conclusion & alert: CVE-2025-13473 is rated Low Risk (23.9/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.03%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-13473

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-02-04 0.03%

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-13473

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
1.6 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2025-13473

GitHub Security Advisory for CVE-2025-13473

GHSA-2mcm-79hx-8fxw · Severity: low · Ecosystem: pip — Django has Observable Timing Discrepancy

OS Trackers for CVE-2025-13473

vendor priority summary link
alpine CVE-2025-13473: 1 source package rows (py3-django); 2 state rows across 2 repos (3.23-community, edge-community); fixed 2, open 0. https://security.alpinelinux.org/vuln/CVE-2025-13473
debian not yet assigned CVE-2025-13473 not yet assigned priority: Debian including 1 source packages (python-django), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2025-13473
redhat low https://access.redhat.com/security/cve/CVE-2025-13473
suse high CVE-2025-13473 severity important: SUSE including 11 source package names (python3-Django-2.2.28-bp156.30.1, python311-Django-4.2.11-150600.3.47.1, …), 13 product×package rows across 5 product lines (SUSE Linux Enterprise Module for Package Hub 15 SP7, SUSE Package Hub 15 SP6, … (5 product lines)): Fixed 13. https://www.suse.com/security/cve/CVE-2025-13473/
ubuntu medium CVE-2025-13473 medium priority: Ubuntu including 1 source packages (python-django), 8 status rows across 8 suites (bionic, focal, jammy, noble, questing, trusty, upstream, xenial): released 8. https://ubuntu.com/security/CVE-2025-13473

Affected software / configurations for CVE-2025-13473

Vendor Product Version Raw CPE
djangoproject django >= 4.2, < 4.2.28 cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
djangoproject django >= 5.2, < 5.2.11 cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
djangoproject django >= 6.0, < 6.0.2 cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*

References for CVE-2025-13473

cvelogic Threat Intelligence