CVE-2013-5704

MEDIUMCVSS v2 · 5.05.0—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 5.0 — v2 rates that MEDIUM (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:N/AC:L/Au:N/C:N/I:P/A:N. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 52.6% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Sources: epss, nvd_v2
Trending — 3 sources updated this weekElevated
5.0EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • 341 internet-facing services (distinct ip:port) on record running an affected version — derived from Shodan data (© Shodan); a patched service can stay counted while its port stays open
  • High exploitation likelihood — EPSS 53%
CISA-KEV: Not listedEPSS PROB: 53%CVSS v2: 5.0Exploit: Elevated riskExposed services: 341

A fix is available — apply it.

The mod_headers module in the Apache HTTP Server 2.2.22 allows remote attackers to bypass "RequestHeader unset" directives by placing a header in the trailer portion of data sent with chunked transfer coding. NOTE: the vendor states "this is not a security issue in httpd as such."

Internet exposure · derived from Shodan data

341 internet-facing services (distinct ip:port) on record running a version that maps to CVE-2013-5704, in our KEV-Exposure radar’s Shodan-derived sample.

across 54 countries (United States, Japan, Germany, Italy, United Kingdom)top: http_server
See the KEV-Exposure radar →Derived from Shodan data. Shodan data is owned by Shodan, which holds its copyright (© Shodan). EchelonGraph claims no ownership of it or copyright in it. Aggregate, host-redacted.

How it counts: every 12 hours, when Shodan query credits allow, the radar runs one Shodan query per tracked product, reads up to 100 ip:port services per query, and keeps a service when its banner version matches a CISA-KEV or high-EPSS CVE; a service is dropped when neither a search nor a Shodan InternetDB port re-check has refreshed it for 21 days. A re-check that finds the port still listed by Shodan InternetDB refreshes the service without re-reading the banner, so a patched service can stay counted while its port stays open. A count is a banner-version inference over a sample, not an exploit test and not an internet-wide census, and the unit is a service, not a machine: a machine answering on two ports counts twice.

CVSS v2.0 (legacy)
5.0MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
5.0MEDIUMlow confidence
EG Risk
48
EG Risk 48/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity50% × 45%
Exploitation53% × 40%
Automatability30% × 15%
CISA SSVC: Track at low, Track or Track* at medium and Track* or Attend at high mission impact.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
53%
EPSS %ILE
98th
KEV
Not listed

CISA SSVCTrack at low, Track or Track* at medium and Track* or Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (EG-KEV: elevated) · Automatable unknown (not published for this CVE) · Technical impact unknown (not published for this CVE). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

April 15, 2014

Last Modified

May 6, 2026

References (94)

Patch Availability(9)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuapache2.2-bin (2.4.10-1ubuntu1.1) @ utopic2026-05-28ubuntu
redhatmod_cluster-native-0:1.2.9-6.Final_redhat_2.ep6.el72016-01-21redhat
redhathttpd2016-01-21redhat
redhatpatch2015-12-16redhat
redhattomcat-vault-0:1.0.8-4.Final_redhat_4.1.ep7.el62015-12-16redhat
redhattomcat-vault-0:1.0.8-4.Final_redhat_4.1.ep7.el72015-12-16redhat
redhathttpd-0:2.2.15-45.el62015-07-20redhat
redhathttpd-0:2.4.6-31.el72015-03-05redhat
redhathttpd24-httpd-0:2.4.6-25.el72014-12-09redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.10-2: fixed in 2.4.10-2
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.10-2: fixed in 2.4.10-2
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.10-2: fixed in 2.4.10-2
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.10-2: fixed in 2.4.10-2
—
Debian:6.0(1)
PackageVulnerable rangeFix by version rangeDependents
apache22.2.16-6 ... 2.2.16-6+squeeze8 (15 versions)
  • every version up to 2.2.16-6+squeeze14: fixed in 2.2.16-6+squeeze14
—

All Vendor Advisories

(9)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 3× in last 7d / 12× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 108 total refreshes for this CVE.

  1. 2026-09-30 14:58 UTCEPSS rescore
  2. 2026-09-30 00:15 UTCEG score recompute
  3. 2026-09-29 22:11 UTCOSV refresh
  4. 2026-09-27 13:39 UTCEPSS rescore
  5. 2026-09-26 15:53 UTCEPSS rescore
  6. 2026-09-21 20:25 UTCEPSS rescore
  7. 2026-09-20 20:08 UTCEPSS rescore
  8. 2026-09-18 19:21 UTCEPSS rescore
  9. 2026-09-17 19:21 UTCEPSS rescore
  10. 2026-09-15 03:04 UTCEPSS rescore
  11. 2026-09-12 14:55 UTCEPSS rescore
  12. 2026-09-10 18:23 UTCOSV refresh
  13. 2026-09-04 13:55 UTCEPSS rescore
  14. 2026-08-30 19:12 UTCEPSS rescore
  15. 2026-08-26 14:41 UTCEPSS rescore
  16. 2026-08-23 11:52 UTCOSV refresh
  17. 2026-08-23 00:13 UTCEPSS rescore
  18. 2026-08-21 23:44 UTCEPSS rescore
  19. 2026-08-20 22:50 UTCEPSS rescore
  20. 2026-08-19 16:59 UTCEPSS rescore
  21. 2026-08-18 13:43 UTCEPSS rescore
  22. 2026-08-16 14:50 UTCEPSS rescore
  23. 2026-08-16 02:09 UTCEPSS rescore
  24. 2026-08-15 01:25 UTCEPSS rescore
  25. 2026-08-07 16:21 UTCEPSS rescore
Show 75 more
  1. 2026-08-07 13:56 UTCOSV refresh
  2. 2026-08-05 19:12 UTCEPSS rescore
  3. 2026-07-30 16:23 UTCEPSS rescore
  4. 2026-07-30 01:26 UTCEPSS rescore
  5. 2026-07-28 15:31 UTCEPSS rescore
  6. 2026-07-26 13:49 UTCEG score recompute▲ 5.00
  7. 2026-07-23 14:14 UTCEPSS rescore
  8. 2026-07-23 01:11 UTCEG score recompute▼ 4.90
  9. 2026-07-23 00:14 UTCEG score recompute▲ 4.90
  10. 2026-07-22 21:52 UTCEG score recompute
  11. 2026-07-22 14:04 UTCEPSS rescore
  12. 2026-07-22 06:18 UTCOSV refresh
  13. 2026-07-21 15:21 UTCEPSS rescore
  14. 2026-07-21 15:21 UTCEPSS rescore
  15. 2026-07-20 17:03 UTCEPSS rescore
  16. 2026-07-20 17:03 UTCEPSS rescore
  17. 2026-07-19 14:27 UTCEPSS rescore
  18. 2026-07-19 14:27 UTCEPSS rescore
  19. 2026-07-19 02:25 UTCEPSS rescore
  20. 2026-07-16 16:58 UTCEPSS rescore
  21. 2026-07-15 16:54 UTCEPSS rescore
  22. 2026-07-15 16:54 UTCEPSS rescore
  23. 2026-07-13 22:26 UTCEPSS rescore
  24. 2026-07-13 06:08 UTCEPSS rescore
  25. 2026-07-09 19:05 UTCEPSS rescore
  26. 2026-07-05 02:26 UTCEPSS rescore
  27. 2026-07-05 01:26 UTCOSV refresh
  28. 2026-07-02 15:21 UTCEPSS rescore
  29. 2026-07-01 15:02 UTCEPSS rescore
  30. 2026-06-30 23:19 UTCEPSS rescore
  31. 2026-06-27 03:05 UTCEPSS rescore
  32. 2026-06-25 13:47 UTCEPSS rescore
  33. 2026-06-25 13:47 UTCEPSS rescore
  34. 2026-06-24 14:02 UTCEPSS rescore
  35. 2026-06-24 14:02 UTCEPSS rescore
  36. 2026-06-23 21:30 UTCEPSS rescore
  37. 2026-06-23 21:30 UTCEPSS rescore
  38. 2026-06-21 01:57 UTCEPSS rescore
  39. 2026-06-21 01:57 UTCEPSS rescore
  40. 2026-06-18 17:49 UTCEPSS rescore
  41. 2026-06-18 17:49 UTCEPSS rescore
  42. 2026-06-17 17:49 UTCEPSS rescore
  43. 2026-06-17 17:49 UTCEPSS rescore
  44. 2026-06-16 17:49 UTCEPSS rescore
  45. 2026-06-16 17:49 UTCEPSS rescore
  46. 2026-06-16 17:49 UTCEPSS rescore
  47. 2026-06-16 13:09 UTCOSV refresh
  48. 2026-06-15 17:44 UTCEPSS rescore
  49. 2026-06-12 23:08 UTCEPSS rescore
  50. 2026-06-11 13:56 UTCEPSS rescore
  51. 2026-06-10 22:15 UTCEPSS rescore
  52. 2026-06-06 13:45 UTCEPSS rescore
  53. 2026-06-06 13:45 UTCEPSS rescore
  54. 2026-06-05 22:44 UTCEPSS rescore
  55. 2026-06-05 22:44 UTCEPSS rescore
  56. 2026-06-05 06:08 UTCEPSS rescore
  57. 2026-06-05 06:08 UTCEPSS rescore
  58. 2026-06-04 13:09 UTCEPSS rescore
  59. 2026-06-04 13:09 UTCEPSS rescore
  60. 2026-06-02 20:10 UTCEPSS rescore
  61. 2026-06-02 20:10 UTCEPSS rescore
  62. 2026-06-01 13:49 UTCEPSS rescore
  63. 2026-06-01 13:49 UTCEPSS rescore
  64. 2026-05-31 00:14 UTCEPSS rescore
  65. 2026-05-31 00:14 UTCEPSS rescore
  66. 2026-05-29 13:41 UTCEPSS rescore
  67. 2026-05-29 13:41 UTCEPSS rescore
  68. 2026-05-28 19:32 UTCEG score recompute
  69. 2026-05-28 19:32 UTCVendor advisory
  70. 2026-05-28 19:32 UTCGHSA enrichment
  71. 2026-05-27 13:38 UTCEPSS rescore
  72. 2026-05-27 13:38 UTCEPSS rescore
  73. 2026-05-27 13:37 UTCOSV refresh
  74. 2026-05-26 07:16 UTCEPSS rescore
  75. 2026-05-26 07:16 UTCEPSS rescore

Related CVEs(same product + same vendor)

Frequently asked(4)

What is CVE-2013-5704?
CVE-2013-5704 is a medium vulnerability published on April 15, 2014. The mod_headers module in the Apache HTTP Server 2.2.22 allows remote attackers to bypass "RequestHeader unset" directives by placing a header in the trailer portion of data sent with chunked transfer coding. NOTE: the vendor states "this is not a security issue in httpd as such."
When was CVE-2013-5704 disclosed?
CVE-2013-5704 was first published on April 15, 2014, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2013-5704 actively exploited?
CVE-2013-5704 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 53% probability of exploitation in the next 30 days (98th percentile of EPSS-scored CVEs).
How do I remediate CVE-2013-5704?
A fix for CVE-2013-5704 is available: update to the fixed version the vendor names in its advisory.

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