The mod_dav_svn Apache HTTPD server module in Subversion 1.7.0 through 1.7.10 and 1.8.x before 1.8.1 allows remote authenticated users to cause a denial of service (assertion failure or out-of-bounds read) via a certain (1) COPY, (2) DELETE, or (3) MOVE request against a revision root.
Conclusion & alert: CVE-2013-4131 is rated Moderate Risk (51.2/100): CVSS Medium severity, with high exploitation likelihood (EPSS 4.38%, 90th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +3.72% over the last day, indicating growing attacker interest. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
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 | 2026-06-15 | 0.66% | 4.38% | +3.72% |
| 2 | 2026-02-01 | 0.90% | 0.66% | -0.24% |
| 3 | 2025-12-28 | — | 0.90% | — |
Full EPSS history (14 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 4.0 | 2.0 | MEDIUM |
|
8.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2013-4131 not yet assigned priority: Debian including 1 source packages (subversion), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2013-4131 |
gentoo
|
low | CVE-2013-4131: 1 GLSA(s) (201309-11), 1 atom(s) (dev-vcs/subversion); latest impact low. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2013-4131 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2013-4131 |
ubuntu
|
medium | CVE-2013-4131 medium priority: Ubuntu including 1 source packages (subversion), 7 status rows across 7 suites (lucid, precise, quantal, raring, saucy, trusty, upstream): ignored 4, DNE 1, not-affected 1, released 1. | https://ubuntu.com/security/CVE-2013-4131 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| apache | subversion | 1.7.0 | cpe:2.3:a:apache:subversion:1.7.0:*:*:*:*:*:*:* |
| apache | subversion | 1.7.1 | cpe:2.3:a:apache:subversion:1.7.1:*:*:*:*:*:*:* |
| apache | subversion | 1.7.2 | cpe:2.3:a:apache:subversion:1.7.2:*:*:*:*:*:*:* |
| apache | subversion | 1.7.3 | cpe:2.3:a:apache:subversion:1.7.3:*:*:*:*:*:*:* |
| apache | subversion | 1.7.4 | cpe:2.3:a:apache:subversion:1.7.4:*:*:*:*:*:*:* |
| apache | subversion | 1.7.5 | cpe:2.3:a:apache:subversion:1.7.5:*:*:*:*:*:*:* |
| apache | subversion | 1.7.6 | cpe:2.3:a:apache:subversion:1.7.6:*:*:*:*:*:*:* |
| apache | subversion | 1.7.7 | cpe:2.3:a:apache:subversion:1.7.7:*:*:*:*:*:*:* |
| apache | subversion | 1.7.8 | cpe:2.3:a:apache:subversion:1.7.8:*:*:*:*:*:*:* |
| apache | subversion | 1.7.9 | cpe:2.3:a:apache:subversion:1.7.9:*:*:*:*:*:*:* |
| apache | subversion | 1.7.10 | cpe:2.3:a:apache:subversion:1.7.10:*:*:*:*:*:*:* |
| apache | subversion | 1.8.0 | cpe:2.3:a:apache:subversion:1.8.0:*:*:*:*:*:*:* |