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Get paid to secure open source 475 paid open-source programs on Sorona, up to $1M Perk Low bugs: $100 or 1 mo Claude Max

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sorona.xyz bug bounty programs

exim.org Updated

Sorona.xyz runs one public program: a Sorona bug bounty paying up to $1,500.

Top reward
$1,500
Sorona
Programs
1
1 pays cash
Targets in scope
11
2 types
Last change
None yet
Tracked since Nov 2026

Where to report

The one public program sorona.xyz runs.

  • Exim

    Sorona · Bug bounty

    Open

    Top reward

    $1,500
    Critical
    –
    High
    –
    Medium
    –
    Low
    $100
    Safe harbor
    Partial

Amounts are the top reward per severity in the currency each program pays. First response is the platform's measured average when it publishes one, else what the policy promises.

What is in scope

11 targets. 6 excluded.

  • https://www.exim.org

    Web

  • Authentication and access control in the SMTP conversation: the authenticators, relay control, and anything that gets Exim to accept, relay or attribute mail it should have refused

    Products and areas

  • Exim's privilege model, which traditionally runs as a single setuid-root binary and so converts a parser bug straight into root

    Products and areas

  • Header, envelope and address parsing, including the buffer handling and integer arithmetic where a length or offset computation can wrap and a later copy trusts the result

    Products and areas

  • Message authentication and transport security as Exim implements them: DKIM, SPF, DMARC handling and TLS certificate and chain validation

    Products and areas

  • Queue handling and the spool, including race conditions that let a queued message be delivered, rewritten or dropped in a way the operator never configured

    Products and areas

  • Reports go to [email protected] and cover upstream Exim itself, with the live tree at code.exim.org rather than the archived GitHub mirror. Nothing narrower than the MTA is carved out

    Products and areas

  • The lookup and database layer, dnsdb, LDAP, SQL and file lookups among it, where attacker-influenced strings reach another parser

    Products and areas

  • The routers and transports as a whole, covering delivery, address rewriting, aliasing and forwarding, plus the local-delivery paths that run as another user

    Products and areas

  • The SMTP receive path in full, from connection through to acceptance, including every ACL and every command the peer can issue

    Products and areas

  • The string-expansion machinery and string_format, the engine that Exim's configuration language runs on and historically the source of its worst bugs

    Products and areas

No target matches. Try part of a host name, such as the company name.

Out of scope 6

Don't test these. A program can exclude a host another program covers; the program you report to decides.

  • A vulnerability report on its own where the patch money is concerned: that rail pays only on a change merged upstream that then survives a month without reverts

  • Configuration-error findings in third-party Exim deployments, including the cPanel default configuration, rather than defects in Exim itself

  • One-liner patches that fix non-exploitable crashes, and denial of service by resource exhaustion, which the rules exclude by name

  • Patches proposed against the archived github.com/Exim/exim mirror rather than the live upstream at code.exim.org

  • Patches submitted before the one-month no-revert window has elapsed, or older than twelve months, and anything past three submissions per person per month

  • Patches the Exim maintainers decline, since Google explicitly declines to second-guess a maintainer's decision

Recent changes

Reward and scope changes across every sorona.xyz program, newest first.

No changes recorded yet. New targets and reward moves show up here and in the RSS feed.

Recent CVEs

Published vulnerabilities in sorona.xyz products, from the NVD.

Search NVD
  • CVE-2026-94054 High

    Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, has an out-of-bounds write.

  • CVE-2026-94055 Low

    Exim before 4.100.1, when certain non-default TLS settings are used with GnuTLS, has a use-after-free.

  • CVE-2026-94056 High

    Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, allows attackers to read certain uninitialized data from stack memory.

  • CVE-2026-94057 Medium

    Exim before 4.100.1 allows SMTP smuggling in which the received message does not match any sent message, and instead depends on crafted data sent after a rejection during DATA processing.

  • CVE-2026-66140 High

    Exim before 4.99.5 allows directory traversal to access files outside of the spool area, and consequently gain privileges, because arguments related to queue-name are mishandled.

  • CVE-2026-66141 High

    Exim before 4.99.5 allows .forward privilege escalation because force_command for a pipe transport is mishandled.

  • CVE-2026-48840 Medium

    Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosure of uninitialized stack memory values to a client.

  • CVE-2026-45185 Critical

    Exim before 4.99.3, in certain GnuTLS configurations, has a remotely reachable use-after-free in the BDAT body parsing path. It is triggered when a client sends a TLS close_notify mid-body during a CHUNKING transfer, followed by a final cleartext byte on the same TCP connection. This can lead to heap corruption. An unauthenticated network attacker exploiting this vulnerability could execute arbitr

About this page

This page gathers every public program listed under exim.org: platform programs, self-hosted policies and security.txt contacts. Each program's own policy decides what is in scope and what it pays; check it before you test.

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