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CVE-2019-12401

28
FAUCET Score

CVE-2019-12401 is a high-severity XML resource consumption vulnerability (Lol Bomb) affecting Apache Solr versions 1.3.0 to 1.4.1, 3.1.0 to 3.6.2, and 4.0.0 to 4.10.4. An unauthenticated attacker can exploit this by sending specially crafted XML to the update handler, causing the server to run out of memory (OOM) and leading to a denial of service. While the CVSS score is 7.5 (High), there is currently no public exploit code, active exploitation, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.3.0, <= 1.4.1CPE matchmatch criteria
cpe:2.3:a:apache:solr:*:*:*:*:*:*:*:*
>= 3.1, <= 3.6.2CPE matchmatch criteria
cpe:2.3:a:apache:solr:*:*:*:*:*:*:*:*
>= 4.0.0, <= 4.10.4CPE matchmatch criteria
cpe:2.3:a:apache:solr:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
7.51%
Probability of exploitation in next 30 days
EPSS Percentile
93.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0751 is in the 90th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

mavenpatch availablevia ghsa
Product: org.apache.solr:solr-coreFixed in: 5.0.0

Vendor Advisories (2)

mavenGHSA-jq2w-w7v2-69q5high

Apache Solr vulnerable to XML Bomb

May 24, 2022
redhatCVE-2019-12401Moderate

solr: XML resource consumption attack via update handler

Sep 9, 2019

References

mail-archives.us.apache.org / mod_mbox/www-announce/201909.mbox/%3CCAECwjAXU4%3DkAo5DeUJw7Kvk67sgCmajAN7LGZQNjbjZ8gv%3DBdw%40mail.gmail.com%3E
Broken LinkMailing ListVendor Advisory
github.com / DrunkenShells/Disclosures/tree/master/CVE-2019-12401-XML%20Bomb-Apache%20Solr
ExploitThird Party Advisory
lists.apache.org / thread.html/048ae6e4f84a88e8856f766320b48ad91f9fca2c6f621aa2c40088fe%40%3Cdev.lucene.apache.org%3E
lists.apache.org / thread.html/0ec231c5ed8d242890e21806d25fdd47f80cc47cac278d2fc1c9c579%40%3Cdev.lucene.apache.org%3E
lists.apache.org / thread.html/1c92300643f48f13bc59b15e3f886ba62bae1798c7d4c2e5c1ece09b%40%3Cannounce.apache.org%3E
lists.apache.org / thread.html/521d10a19bfb590f86dff41820ccfb11e92281f233a12c882650931e%40%3Cdev.lucene.apache.org%3E
lists.apache.org / thread.html/60a924662ead9aeea74e8ea128d9ca935f8de925aa71b15ab2787d6a%40%3Csolr-user.lucene.apache.org%3E
lists.apache.org / thread.html/7ab5e95a1a0b4f35ffe53f1eb0cb74b4348b49d41b72ac155b843fa2%40%3Cgeneral.lucene.apache.org%3E
lists.apache.org / thread.html/db8eaca456d03c00a66cbe37548978318d424b9997e3fd7f5c65dffe%40%3Cdev.lucene.apache.org%3E
security.netapp.com / advisory/ntap-20190926-0002
Third Party Advisory
openwall.com / lists/oss-security/2019/09/10/1
Mailing ListThird Party Advisory