CVE-2018-8741

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-14. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 4%CVSS: 8.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A directory traversal flaw in SquirrelMail 1.4.22 allows an authenticated attacker to exfiltrate (or potentially delete) files from the hosting server, related to ../ in the att_local_name field in Deliver.class.php.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
46(Track)
EG Risk 46/100SSVC: Track

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
Severity88% × 45%
Exploitation4% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
4%
EPSS %ILE
91%
KEV
Not listed

Published

March 17, 2018

Last Modified

November 21, 2024

Advisory Details (9)

Auto-updated Aug 2, 2026
Patch available.
generic

oss-security - Squirrelmail directory traversal vulnerability allows exfiltrating files from server

http://www.openwall.com/lists/oss-security/2018/03/17/2
generic

[SECURITY] [DSA 4168-1] squirrelmail security update

https://www.debian.org/security/2018/dsa-4168
generic

Paste #OjSLiFTxiBrTk63jqEUu at spacepaste

https://paste.pound-python.org/show/OjSLiFTxiBrTk63jqEUu/
generic

[SECURITY] Fedora 29 Update: squirrelmail-1.4.23-1.fc29.20190710 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T5FP5O562A4FM5TCFNEW73SS6PZONSAC/
generic

[SECURITY] Fedora 30 Update: squirrelmail-1.4.23-1.fc30.20190710 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CVXTYMZ35IC5KPNMAE6BWAQWURMX7KZO/
generic Patch Available

[SECURITY] [DLA 1344-1] squirrelmail security update

https://lists.debian.org/debian-lts-announce/2018/04/msg00012.html
generic

Squirrelmail Full Disclosure – TROOPERS18 – Insinuator.net

https://insinuator.net/2018/03/squirrelmail-full-disclosure-troopers18/
generic

squirrelmail quick fix for file disclosure vuln presented at Troopers 2018 (#TR18) · GitHub

https://gist.github.com/hannob/3c4f86863c418930ad08853c1109364e
generic
http://www.securitytracker.com/id/1040554

Affected Packages

(2 across 2 ecosystems)
Debian:7(1)
PackageVulnerable rangeFixed inDependents
squirrelmail2:1.4.23~svn20120406-2, 2:1.4.23~svn20120406-2+deb7u12:1.4.23~svn20120406-2+deb7u2—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
squirrelmail2:1.4.23~svn20120406-2, 2:1.4.23~svn20120406-2+deb8u12:1.4.23~svn20120406-2+deb8u2—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 20× 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 145 total refreshes for this CVE.

  1. 2026-09-24 13:59 UTCEPSS rescore
  2. 2026-09-23 13:42 UTCEPSS rescore
  3. 2026-09-21 20:27 UTCEPSS rescore
  4. 2026-09-19 15:36 UTCEPSS rescore
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  1. 2026-08-19 17:00 UTCEPSS rescore
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  7. 2026-08-13 21:56 UTCEPSS rescore
  8. 2026-08-12 13:47 UTCEPSS rescore
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  10. 2026-08-08 16:32 UTCEPSS rescore
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  20. 2026-07-28 15:32 UTCEPSS rescore
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  27. 2026-07-23 14:15 UTCEPSS rescore
  28. 2026-07-23 14:15 UTCEPSS rescore
  29. 2026-07-23 01:37 UTCEG score recompute
  30. 2026-07-22 22:17 UTCEG score recompute
  31. 2026-07-22 14:05 UTCEPSS rescore
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  41. 2026-07-15 16:55 UTCEPSS rescore
  42. 2026-07-15 01:56 UTCEPSS rescore
  43. 2026-07-13 22:27 UTCEPSS rescore
  44. 2026-07-13 06:10 UTCEPSS rescore
  45. 2026-07-12 05:43 UTCEPSS rescore
  46. 2026-07-09 19:06 UTCEPSS rescore
  47. 2026-07-08 15:11 UTCEPSS rescore
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  65. 2026-06-25 13:47 UTCEPSS rescore
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  73. 2026-06-21 14:54 UTCEPSS rescore
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  75. 2026-06-21 01:57 UTCEPSS rescore

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2018-8741?
CVE-2018-8741 is a high vulnerability published on March 17, 2018. A directory traversal flaw in SquirrelMail 1.4.22 allows an authenticated attacker to exfiltrate (or potentially delete) files from the hosting server, related to ../ in the attlocalname field in Deliver.class.php.
When was CVE-2018-8741 disclosed?
CVE-2018-8741 was first published in the National Vulnerability Database on March 17, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-8741 actively exploited?
CVE-2018-8741 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4% probability of exploitation in the next 30 days, which ranks it in the top 9.4% of all scored CVEs.
What is the CVSS score of CVE-2018-8741?
CVE-2018-8741 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2018-8741?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-8741, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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