CVE-2023-25725

CRITICALNVD 9.19.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2023-02-14. NVD baseline CVSS 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this week

Also known asEUVD-2023-29633 (ENISA EUVD) · GHSA-h2p2-w857-329f (GitHub Security Advisories)Source: ENISA EUVD

9.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 5.5%CVSS: 9.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

HAProxy before 2.7.3 may allow a bypass of access control because HTTP/1 headers are inadvertently lost in some situations, aka "request smuggling." The HTTP header parsers in HAProxy may accept empty header field names, which could be used to truncate the list of HTTP headers and thus make some headers disappear after being parsed and processed for HTTP/1.0 and HTTP/1.1. For HTTP/2 and HTTP/3, the impact is limited because the headers disappear before being parsed and processed, as if they had not been sent by the client. The fixed versions are 2.7.3, 2.6.9, 2.5.12, 2.4.22, 2.2.29, and 2.0.31.

CVSS v3
9.1
EG Score
9.1CRITICALmedium confidence
EG Risk
58
EG Risk 58/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity91% × 45%
Impact severity (EG Severity): CVSS 9.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation5.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
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
5.5%
EPSS %ILE
92nd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.1): severity, escalated by confirmed exploitation. This CVE's 9.1 is its impact severity (EG Severity), not escalated.

EG Severity
9.1 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
5.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

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

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

February 14, 2023

Last Modified

March 20, 2025

Advisory Details (5)

Auto-updated Aug 2, 2026
Patch available.
Web page

[SECURITY] Fedora 37 Update: haproxy-2.6.9-1.fc37 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JM5NCIBTHYDTLPY2UNC4HO2VAHHE6CJG/
Web page

[SECURITY] Fedora 36 Update: haproxy-2.4.22-2.fc36 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FPTJQHKUEU2PQ7RWFUYAFLAD4STEIKHU/
Web pageMentions a patch (unverified)

[SECURITY] [DLA 3318-1] haproxy security update

https://lists.debian.org/debian-lts-announce/2023/02/msg00012.html
Web page

HAProxy - The Reliable, High Perf. TCP/HTTP Load Balancer

https://www.haproxy.org/
Web page

[SECURITY] [DSA 5348-1] haproxy security update

https://www.debian.org/security/2023/dsa-5348

Patch Availability(9)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuvim-haproxy (1.6.3-1ubuntu0.3+esm2) @ xenial2026-11-01ubuntu
ubuntuvim-haproxy (2.4.18-1ubuntu1.2) @ kinetic2026-11-01ubuntu
redhatrhceph/rhceph-haproxy-rhel8:2.2.19-322024-02-08redhat
redhathaproxy-0:2.2.24-3.rhaos4.13.el82023-05-18redhat
redhathaproxy-0:2.4.7-2.el9_0.22023-04-25redhat
redhathaproxy-0:2.2.19-4.el82023-04-12redhat
redhathaproxy-0:2.2.24-3.rhaos4.11.el82023-04-12redhat
redhathaproxy-0:2.4.17-3.el9_1.22023-04-11redhat
redhathaproxy-0:2.2.24-3.rhaos4.12.el82023-03-21redhat

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:10(1)
PackageVulnerable rangeFix by version rangeDependents
haproxy1.8.19-1, 1.8.19-1+deb10u1, 1.8.19-1+deb10u2, 1.8.19-1+deb10u2~bpo9+1, 1.8.19-1+deb10u3
  • every version up to 1.8.19-1+deb10u4: fixed in 1.8.19-1+deb10u4
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
haproxy2.2.9-2 ... 2.2.9-2+deb11u3~bpo10+1 (7 versions)
  • every version up to 2.2.9-2+deb11u4: fixed in 2.2.9-2+deb11u4
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
haproxy—
  • every version up to 2.6.8-2: fixed in 2.6.8-2
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
haproxy—
  • every version up to 2.6.8-2: fixed in 2.6.8-2
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
haproxy—
  • every version up to 2.6.8-2: fixed in 2.6.8-2
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(4)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 27× in last 7d / 93× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 271 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 171 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:30 UTCEPSS rescoreEPSS 5.5% · 92nd percentile
  2. 2026-11-01 14:27 UTCEG score recompute
  3. 2026-11-01 14:27 UTCVendor advisory
  4. 2026-11-01 14:27 UTCGHSA enrichmentGHSA-h2p2-w857-329f · GitHub severity CRITICAL · GitHub CVSS 9.1
  5. 2026-10-31 16:29 UTCEPSS rescoreEPSS 5.5% · 92nd percentile
  6. 2026-10-31 15:25 UTCEG score recompute
  7. 2026-10-31 15:25 UTCVendor advisory
  8. 2026-10-31 15:25 UTCGHSA enrichmentGHSA-h2p2-w857-329f · GitHub severity CRITICAL · GitHub CVSS 9.1
  9. 2026-10-30 16:31 UTCEPSS rescoreEPSS 5.5% · 92nd percentile
  10. 2026-10-30 16:24 UTCVendor advisory
  11. 2026-10-30 16:24 UTCGHSA enrichmentGHSA-h2p2-w857-329f · GitHub severity CRITICAL · GitHub CVSS 9.1
  12. 2026-10-29 17:22 UTCEG score recompute
  13. 2026-10-29 17:22 UTCVendor advisory
  14. 2026-10-29 17:22 UTCGHSA enrichmentGHSA-h2p2-w857-329f · GitHub severity CRITICAL · GitHub CVSS 9.1
  15. 2026-10-29 16:30 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  16. 2026-10-28 18:20 UTCEG score recompute
  17. 2026-10-28 18:20 UTCVendor advisory
  18. 2026-10-28 18:20 UTCGHSA enrichmentGHSA-h2p2-w857-329f · GitHub severity CRITICAL · GitHub CVSS 9.1
  19. 2026-10-28 16:29 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  20. 2026-10-27 19:12 UTCEG score recompute
  21. 2026-10-27 19:12 UTCVendor advisory
  22. 2026-10-27 19:12 UTCGHSA enrichmentGHSA-h2p2-w857-329f · GitHub severity CRITICAL · GitHub CVSS 9.1
  23. 2026-10-27 16:29 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  24. 2026-10-26 20:11 UTCEG score recompute
  25. 2026-10-26 20:11 UTCVendor advisory
Show 75 more
  1. 2026-10-26 20:11 UTCGHSA enrichmentGHSA-h2p2-w857-329f · GitHub severity CRITICAL · GitHub CVSS 9.1
  2. 2026-10-26 16:28 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  3. 2026-10-25 19:11 UTCVendor advisory
  4. 2026-10-25 19:10 UTCGHSA enrichmentGHSA-h2p2-w857-329f · GitHub severity CRITICAL · GitHub CVSS 9.1
  5. 2026-10-25 17:46 UTCEG score recompute
  6. 2026-10-25 16:29 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  7. 2026-10-24 19:46 UTCEG score recompute
  8. 2026-10-24 19:46 UTCVendor advisory
  9. 2026-10-24 19:45 UTCGHSA enrichmentGHSA-h2p2-w857-329f · GitHub severity CRITICAL · GitHub CVSS 9.1
  10. 2026-10-24 16:29 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  11. 2026-10-23 20:44 UTCEG score recompute
  12. 2026-10-23 20:44 UTCVendor advisory
  13. 2026-10-23 20:43 UTCGHSA enrichmentGHSA-h2p2-w857-329f · GitHub severity CRITICAL · GitHub CVSS 9.1
  14. 2026-10-23 16:29 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  15. 2026-10-22 21:38 UTCEG score recompute
  16. 2026-10-22 21:38 UTCVendor advisory
  17. 2026-10-22 21:38 UTCGHSA enrichmentGHSA-h2p2-w857-329f · GitHub severity CRITICAL · GitHub CVSS 9.1
  18. 2026-10-22 16:30 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  19. 2026-10-21 22:30 UTCEG score recompute
  20. 2026-10-21 22:30 UTCVendor advisory
  21. 2026-10-21 22:30 UTCGHSA enrichmentGHSA-h2p2-w857-329f · GitHub severity CRITICAL · GitHub CVSS 9.1
  22. 2026-10-21 16:29 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  23. 2026-10-20 23:29 UTCEG score recompute
  24. 2026-10-20 23:29 UTCVendor advisory
  25. 2026-10-20 23:29 UTCGHSA enrichmentGHSA-h2p2-w857-329f · GitHub severity CRITICAL · GitHub CVSS 9.1
  26. 2026-10-20 16:29 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  27. 2026-10-20 00:27 UTCEG score recompute
  28. 2026-10-20 00:27 UTCVendor advisory
  29. 2026-10-20 00:27 UTCGHSA enrichmentGHSA-h2p2-w857-329f · GitHub severity CRITICAL · GitHub CVSS 9.1
  30. 2026-10-19 16:29 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  31. 2026-10-18 23:19 UTCEG score recompute
  32. 2026-10-18 23:19 UTCVendor advisory
  33. 2026-10-18 23:18 UTCGHSA enrichmentGHSA-h2p2-w857-329f · GitHub severity CRITICAL · GitHub CVSS 9.1
  34. 2026-10-18 16:29 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  35. 2026-10-18 08:09 UTCEG score recompute
  36. 2026-10-18 00:14 UTCEG score recompute
  37. 2026-10-18 00:14 UTCVendor advisory
  38. 2026-10-18 00:14 UTCGHSA enrichmentGHSA-h2p2-w857-329f · GitHub severity CRITICAL · GitHub CVSS 9.1
  39. 2026-10-17 16:29 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  40. 2026-10-17 01:10 UTCEG score recompute
  41. 2026-10-17 01:10 UTCVendor advisory
  42. 2026-10-17 01:10 UTCGHSA enrichmentGHSA-h2p2-w857-329f · GitHub severity CRITICAL · GitHub CVSS 9.1
  43. 2026-10-16 16:35 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  44. 2026-10-16 01:16 UTCEG score recompute
  45. 2026-10-16 01:16 UTCVendor advisory
  46. 2026-10-16 01:16 UTCGHSA enrichmentGHSA-h2p2-w857-329f · GitHub severity CRITICAL · GitHub CVSS 9.1
  47. 2026-10-15 16:29 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  48. 2026-10-14 20:25 UTCEG score recompute
  49. 2026-10-14 20:25 UTCVendor advisory
  50. 2026-10-14 20:24 UTCGHSA enrichmentGHSA-h2p2-w857-329f · GitHub severity CRITICAL · GitHub CVSS 9.1
  51. 2026-10-14 16:29 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  52. 2026-10-13 16:38 UTCEG score recompute
  53. 2026-10-13 16:38 UTCVendor advisory
  54. 2026-10-13 16:38 UTCGHSA enrichmentGHSA-h2p2-w857-329f · GitHub severity CRITICAL · GitHub CVSS 9.1
  55. 2026-10-13 16:29 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  56. 2026-10-12 17:29 UTCEG score recompute
  57. 2026-10-12 17:29 UTCVendor advisory
  58. 2026-10-12 17:29 UTCGHSA enrichmentGHSA-h2p2-w857-329f · GitHub severity CRITICAL · GitHub CVSS 9.1
  59. 2026-10-12 16:30 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  60. 2026-10-11 21:57 UTCEG score recompute
  61. 2026-10-11 13:45 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  62. 2026-10-10 19:57 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  63. 2026-10-09 20:05 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  64. 2026-10-08 17:05 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  65. 2026-10-07 23:45 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  66. 2026-10-06 15:14 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  67. 2026-10-05 17:40 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  68. 2026-10-03 14:23 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  69. 2026-10-02 16:23 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  70. 2026-10-01 19:47 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  71. 2026-09-30 16:19 UTCEG score recompute
  72. 2026-09-30 15:01 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  73. 2026-09-29 15:16 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  74. 2026-09-26 15:55 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  75. 2026-09-26 00:22 UTCEPSS rescoreEPSS 5.4% · 92nd percentile

Frequently asked(5)

What is CVE-2023-25725?
CVE-2023-25725 is a critical-severity vulnerability; its CVE record was published on February 14, 2023. HAProxy before 2.7.3 may allow a bypass of access control because HTTP/1 headers are inadvertently lost in some situations, aka "request smuggling." The HTTP header parsers in HAProxy may accept empty header field names, which could be used to truncate the list of HTTP headers and thus make some…
When was the CVE record for CVE-2023-25725 published?
The CVE record for CVE-2023-25725 was published on February 14, 2023. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of March 20, 2025; the record at its source may have been updated since.
Is CVE-2023-25725 actively exploited?
CVE-2023-25725 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5.5% probability of exploitation in the next 30 days (92nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2023-25725?
CVE-2023-25725 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2023-25725?
A fix for CVE-2023-25725 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2023-25725 are linked in the Vendor Advisories panel on this page.

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