CVE-2011-2605

MEDIUMCVSS v2 · 4.34.3—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 4.3 — 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:M/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 1.0% 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
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS v2: 4.3Exploit: None knownExposed: 0

A fix is available — apply it.

CRLF injection vulnerability in the nsCookieService::SetCookieStringInternal function in netwerk/cookie/nsCookieService.cpp in Mozilla Firefox before 3.6.18 and 4.x through 4.0.1, and Thunderbird before 3.1.11, allows remote attackers to bypass intended access restrictions via a string containing a \n (newline) character, which is not properly handled in a JavaScript "document.cookie =" expression, a different vulnerability than CVE-2011-2374.

CVSS v2.0 (legacy)
4.3MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
4.3(low)
EG Risk
24(Track)
EG Risk 24/100SSVC: 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
Severity43% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
62%
KEV
Not listed

Published

June 30, 2011

Last Modified

April 29, 2026

References (14)

Vendor Advisories for CVE-2011-2605(4)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatthunderbird-0:2.0.0.24-18.el5_62011-06-21redhat
redhatseamonkey-0:1.0.9-71.el42011-06-21redhat
redhatthunderbird-0:3.1.11-2.el6_12011-06-21redhat
redhatxulrunner-0:1.9.2.18-2.el6_12011-06-21redhat

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

(4 across 2 ecosystems)
Debian:6.0(3)
PackageVulnerable rangeFixed inDependents
iceape2.0.11-2, 2.0.11-3, 2.0.11-4, 2.0.11-52.0.11-6—
icedove3.0.11-1, 3.0.11-1+squeeze1, 3.0.11-1+squeeze23.0.11-1+squeeze3—
iceweasel3.5.16-4 ... 3.5.16-8~bpo50+1 (8 versions)3.5.16-8—
Debian:5.0(1)
PackageVulnerable rangeFixed inDependents
xulrunner1.9.0.10-1 ... 1.9.0.9-1 (30 versions)1.9.0.19-12—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 3× in last 7d / 9× 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 127 total refreshes for this CVE.

  1. 2026-09-20 20:08 UTCEPSS rescore
  2. 2026-09-16 13:58 UTCEPSS rescore
  3. 2026-09-15 03:04 UTCEPSS rescore
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  20. 2026-07-26 13:43 UTCEG score recompute▲ 4.30
  21. 2026-07-23 14:14 UTCEPSS rescore
  22. 2026-07-23 01:05 UTCEG score recompute
  23. 2026-07-23 00:09 UTCEG score recompute
  24. 2026-07-22 21:47 UTCEG score recompute
  25. 2026-07-22 14:03 UTCEPSS rescore
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  27. 2026-06-28 14:03 UTCEPSS rescore
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  75. 2026-05-31 00:14 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(4)

What is CVE-2011-2605?
CVE-2011-2605 is a medium vulnerability published on June 30, 2011. CRLF injection vulnerability in the nsCookieService::SetCookieStringInternal function in netwerk/cookie/nsCookieService.cpp in Mozilla Firefox before 3.6.18 and 4.x through 4.0.1, and Thunderbird before 3.1.11, allows remote attackers to bypass intended access restrictions via a string containing a…
When was CVE-2011-2605 disclosed?
CVE-2011-2605 was first published in the National Vulnerability Database on June 30, 2011, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2011-2605 actively exploited?
CVE-2011-2605 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 37.7% of all scored CVEs.
How do I remediate CVE-2011-2605?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-2605, 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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