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CVE-2024-28861

27
FAUCET Score

CVE-2024-28861 is a critical remote code execution vulnerability affecting Symfony 1 versions 1.1.0 through 1.5.18. It stems from dangerous deserialization in the sfNamespacedParameterHolder class, allowing attackers to execute arbitrary code if user-controlled input is deserialized. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with no user interaction required, leading to complete compromise of confidentiality, integrity, and availability. While no active exploitation or public exploit code is currently reported, and community discussion is minimal, the high EPSS and FAUCET scores indicate a significant potential risk.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.1.0, < 1.5.9CPE matchmatch criteria
cpe:2.3:a:friendsofsymfony1:symfony1:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.53%
Probability of exploitation in next 30 days
EPSS Percentile
72.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0153 is in the 59th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: friendsofsymfony1/symfony1Fixed in: 1.5.19
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-pv9j-c53q-h433medium

Gadget chain in Symfony 1 due to uncontrolled unserialized input in sfNamespacedParameterHolder

Mar 22, 2024

References

github.com / FriendsOfSymfony1/symfony1/commit/0bd9d59c69221f49bfc8be8b871b79e12d7d171a
Patch
github.com / FriendsOfSymfony1/symfony1/security/advisories/GHSA-pv9j-c53q-h433
ExploitMitigationVendor Advisory