CVE-2015-3184

Exploitation likely. EPSS gives it a 8.8% chance of exploitation in the next 30 days. A vendor fix is available.

CVSS 2.05.0Medium EPSS percentile95th8.8% chance in 30 days CISA KEVNot listedNo confirmed exploitation
No public exploit known FixVendor fixNo build named by the sources

Published 2015-08-12Updated 2026-05-06Sources: CVE.org, NVD

NVD CVE.org

What to do

The vendor has published a fix. Version details are below where the sources state them.

Apple XcodeAffected: ≤ 7.2.1Upgrade to: after 7.2.1Stated by: NVD

Versions as the sources state them. Full version matrix after sign-in

Steps

Written by AI from the record

Check whether you run Apache Subversion with the mod_authz_svn module on Apache httpd 2.4.x, and confirm the version is 1.7.x before 1.7.21 or 1.8.x before 1.8.14.
If you use Apple Xcode's bundled Subversion tools, check Apple's support page for the affected version.
Upgrade Subversion to 1.7.21 or 1.8.14 (or later) to fully restrict anonymous access.
If upgrading isn't possible right away, review your Subversion access-control configuration to ensure anonymous users are denied by default.
After upgrading, verify that hidden or restricted files are no longer reachable by unauthenticated requests.

Vendor advisory Some work to apply

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

mod_authz_svn in Apache Subversion 1.7.x before 1.7.21 and 1.8.x before 1.8.14, when using Apache httpd 2.4.x, does not properly restrict anonymous access, which allows remote anonymous users to read hidden files via the path name.

In plain language

Written by AI from the record

A bug in Apache Subversion's access-control module could let anonymous visitors view files they shouldn't see, but there's no sign anyone is actively exploiting it, so it's worth fixing without panicking.

mod_authz_svn in Apache Subversion 1.7.x before 1.7.21 and 1.8.x before 1.8.14 (under Apache httpd 2.4.x) fails to enforce path-based access restrictions for anonymous users, allowing unauthenticated disclosure of hidden/restricted files via crafted path names.

If you're affected

Exposure of restricted source files
Leak of internal documents or configs
Unauthorized access to private repository content

What is it

Think of this like a filing cabinet with a lock on certain drawers — this bug means the lock on those drawers doesn't always work for people who haven't signed in, so they could peek inside without permission. It affects the Subversion tool many developers use to store and manage code and documents.

Who is affected

This matters to you if you run an Apache Subversion server with the mod_authz_svn access-control module on Apache httpd 2.4.x, or if you use Apple Xcode's bundled Subversion client tools. It's only a real risk if your Subversion server is reachable by outside users over the internet without requiring them to log in first.

How urgent is it

There is no confirmed exploitation in the wild and no public exploit code, so this is not an active emergency. Press coverage has been increasing, but attention alone isn't evidence of attacks — treat this as a fix-soon item rather than a fire-drill.

What to do — in detail

Confirm exposure by identifying all Subversion servers running mod_authz_svn behind Apache httpd 2.4.x and checking their version numbers; also check any Xcode installations per Apple's advisory (HT206172). Target Subversion 1.7.21 for the 1.7.x branch or 1.8.14 for the 1.8.x branch — both are drop-in upgrades with no known breaking changes for this fix. If immediate upgrade isn't feasible, audit your authz configuration to ensure default-deny rules apply to anonymous users and restrict network access to the Subversion server (e.g., via firewall or VPN) as a temporary mitigation. Monitor Subversion access logs for anomalous unauthenticated requests to hidden paths, and track Apache's and Apple's advisories for any updates.

Technical context

CVSS 5.0 (Medium), vector AV:N/AC:L/Au:N/C:P/I:N/A:N — network-exploitable, low complexity, no authentication required, confidentiality impact only. Weakness: CWE-200 (Information Exposure). Not listed in CISA KEV; no public exploit code exists. EPSS predicts a relatively low likelihood of exploitation with a falling trend. Exploit maturity is effectively nil — this is a disclosure flaw in access-control enforcement, not a code-execution vulnerability, limiting attacker incentive and impact severity.

This is a general assessment based on public vulnerability data. It does not account for your specific infrastructure — when in doubt, consult a security specialist.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS95th

CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

8.8% chance of exploitation activity in the next 30 days, which ranks it in the 95th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Attention now

Rising.

Lifecycle

8 events over 4089 days, from the signal feeds we watch.

2026-10-22EPSS band changemoderate → lowepss band change
2026-06-25OpenVAS check added
2026-05-06Patch availablerecord updated
2015-08-12Publishedweakness classified, att&ck mapped

Affected products

applecommercial · USaka apple inc., apple computer
- xcodeOperating Systems
apacheoss-project · USaka apache http server, apache httpd
- subversionOn-premOSS Libraries / generic-library

And 1 more affected product. See all after sign-in

Technical detail

CVSS 2.0 vector

Open in the CVSS calculator

AV:N/AC:L/Au:N/C:P/I:N/A:N

Scored 5.0 by NVD.

How it is reached

Access Vector NetworkExploitable remotely over the network
Access Complexity LowNo special conditions required
Authentication NoneNo authentication required

Impact if exploited

Confidentiality PartialSome information is disclosed
Integrity NoneNo integrity impact
Availability NoneNo availability impact

Weaknesses

CWE-200No name in the record

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

CollectionT1005Data from Local Systemmedium confidence

Sources

References in the record

And 7 more references. See all after sign-in

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