CVE-2011-2767

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-13. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 9%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

mod_perl 2.0 through 2.0.10 allows attackers to execute arbitrary Perl code by placing it in a user-owned .htaccess file, because (contrary to the documentation) there is no configuration option that permits Perl code for the administrator's control of HTTP request processing without also permitting unprivileged users to run Perl code in the context of the user account that runs Apache HTTP Server processes.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
52(Track)
EG Risk 52/100SSVC: 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
Severity98% × 45%
Exploitation9% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
94.7%
KEV
Not listed

Published

August 26, 2018

Last Modified

November 21, 2024

Advisory Details (8)

Auto-updated Jun 3, 2026
Patch available. Sources: redhat.
generic
https://mail-archives.apache.org/mod_mbox/perl-modperl/201110.mbox/raw/%3C20111004084343.GA21290%40ktnx.net%3E
generic Patch Available

[SECURITY] [DLA 1507-1] libapache2-mod-perl2 security update

https://lists.debian.org/debian-lts-announce/2018/09/msg00018.html
generic
https://lists.apache.org/thread.html/c8ebe8aad147a3ad2e7b0e8b2da45263171ab5d0fc7f8c100feaa94d%40%3Cmodperl-cvs.perl.apache.org%3E
generic Patch Available

#644169 - libapache2-mod-perl2: PerlOptions -Sections not permitted in server config, but should be - Debian Bug report logs

https://bugs.debian.org/644169
redhat Patch Available
https://access.redhat.com/errata/RHSA-2018:2826
redhat Patch Available
https://access.redhat.com/errata/RHSA-2018:2825
redhat Patch Available

Affected: Red Hat Enterprise Linux 6.

https://access.redhat.com/errata/RHSA-2018:2737
generic
http://www.securityfocus.com/bid/105195

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibapache2-mod-perl2 (2.0.5-5ubuntu1.1) @ precise2026-05-28ubuntu
ubuntulibapache2-mod-perl2-doc (2.0.9-4ubuntu1.2) @ xenial2026-05-28ubuntu
redhatrh-perl524-mod_perl-0:2.0.9-10.el72018-09-27redhat
redhatrh-perl526-mod_perl-0:2.0.10-10.el72018-09-27redhat
redhatmod_perl-0:2.0.4-12.el6_102018-09-24redhat

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.

Weakness Classification(1)

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

All Vendor Advisories

(5)

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 12× in last 7d / 35× 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.

  1. 2026-07-23 14:14 UTCEPSS rescore
  2. 2026-07-23 01:05 UTCEG score recompute
  3. 2026-07-23 00:09 UTCEG score recompute
  4. 2026-07-22 21:47 UTCEG score recompute
  5. 2026-07-22 14:03 UTCEPSS rescore
  6. 2026-07-21 15:21 UTCEPSS rescore
  7. 2026-07-21 06:47 UTCOSV refresh
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  25. 2026-07-04 01:56 UTCOSV refresh
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  1. 2026-07-02 14:01 UTCEPSS rescore
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  27. 2026-06-15 17:44 UTCEPSS rescore
  28. 2026-06-15 14:13 UTCOSV refresh
  29. 2026-06-14 23:14 UTCEPSS rescore
  30. 2026-06-14 23:14 UTCEPSS rescore
  31. 2026-06-13 22:57 UTCEPSS rescore
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  44. 2026-06-04 13:09 UTCEPSS rescore
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  48. 2026-05-31 22:28 UTCEPSS rescore
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  57. 2026-05-28 03:46 UTCEG score recompute
  58. 2026-05-28 03:46 UTCVendor advisory
  59. 2026-05-28 03:46 UTCGHSA enrichment
  60. 2026-05-27 13:38 UTCEPSS rescore
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  64. 2026-05-26 07:16 UTCEPSS rescore
  65. 2026-05-26 07:16 UTCEPSS rescore
  66. 2026-05-24 16:43 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2011-2767?
CVE-2011-2767 is a critical vulnerability published on August 26, 2018. mod_perl 2.0 through 2.0.10 allows attackers to execute arbitrary Perl code by placing it in a user-owned .htaccess file, because (contrary to the documentation) there is no configuration option that permits Perl code for the administrator's control of HTTP request processing without also…
When was CVE-2011-2767 disclosed?
CVE-2011-2767 was first published in the National Vulnerability Database on August 26, 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-2011-2767 actively exploited?
CVE-2011-2767 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 94.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2011-2767?
CVE-2011-2767 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2011-2767?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-2767, 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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